[autotest] Delete `atest stable_version`

The `atest stable_version` command has been replaced with the
`stable_version` command.  So, delete the obsolete code.

BUG=chromium:834459
TEST=run `atest stable_version`, see it fail.

Change-Id: Ia3311f39ac7f863827fb2f64489e3e846ecf244a
Reviewed-on: https://chromium-review.googlesource.com/1017818
Commit-Ready: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Ningning Xia <nxia@chromium.org>
diff --git a/cli/atest_unittest.py b/cli/atest_unittest.py
index 7df6683..4396f3a 100755
--- a/cli/atest_unittest.py
+++ b/cli/atest_unittest.py
@@ -10,7 +10,7 @@
 from autotest_lib.cli import cli_mock
 
 ATEST_USAGE_STRING = ('atest [acl|host|job|label|shard|test|user|'
-                      'server|stable_version] [action] [options]')
+                      'server] [action] [options]')
 
 class main_unittest(cli_mock.cli_unittest):
     """Unittest for atest command.
diff --git a/cli/stable_version.py b/cli/stable_version.py
deleted file mode 100644
index 72b517e..0000000
--- a/cli/stable_version.py
+++ /dev/null
@@ -1,181 +0,0 @@
-# Copyright 2014 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""
-This module contains functions to get or update stable version for a given
-board.
-
-The valid actions are:
-list:   Show version of a given board or list all boards and their stable
-        versions if --board option is not specified.
-modify: Set the stable version of a given board to the given value.
-delete: Delete the stable version of a given board. So its stable version will
-        use the value for board `DEFAULT`.
-"""
-
-import common
-
-from autotest_lib.cli import topic_common
-
-
-class stable_version(topic_common.atest):
-    """stable_version class
-
-    atest stable_version [list|delete|modify] <options>
-    """
-    usage_action = '[list|delete|modify]'
-    topic = msg_topic = 'stable_version'
-    msg_items = '<stable_version>'
-
-    def __init__(self):
-        """Add to the parser the options common to all the
-        stable_version actions.
-        """
-        super(stable_version, self).__init__()
-
-        self.parser.add_option('-b', '--board',
-                               help='Name of the board',
-                               type='string',
-                               default=None,
-                               metavar='BOARD')
-
-        self.topic_parse_info = topic_common.item_parse_info(
-                attribute_name='board', use_leftover=True)
-
-
-    def parse(self):
-        """Parse command arguments.
-        """
-        board_info = topic_common.item_parse_info(attribute_name='board')
-        (options, leftover) = super(stable_version, self).parse([board_info])
-
-        self.board = options.board
-        return (options, leftover)
-
-
-    def output(self, results):
-        """Display output.
-
-        For most actions, the return is a string message, no formating needed.
-
-        @param results: return of the execute call.
-        """
-        if results:
-            print results
-
-
-class stable_version_help(stable_version):
-    """Just here to get the atest logic working. Usage is set by its parent.
-    """
-    pass
-
-
-class stable_version_list(stable_version):
-    """atest stable_version list [--board <board>]"""
-
-    def execute(self):
-        """Execute list stable version action.
-        """
-        if self.board:
-            version = self.execute_rpc(op='get_stable_version',
-                                       board=self.board)
-            return {self.board: version}
-        else:
-            return self.execute_rpc(op='get_all_stable_versions')
-
-
-    def output(self, results):
-        """Display output.
-
-        @param results: A dictionary of board:version.
-        """
-        board_columns = max([len(s) for s in results.keys()])
-        version_columns = max([len(s) for s in results.values()])
-        total_columns = board_columns + version_columns + 3
-        format = '%%-%ds | %%s' % board_columns
-        print '=' * total_columns
-        print format % ('board', 'version')
-        print '-' * total_columns
-        for board,version in results.iteritems():
-            print format % (board, version)
-        print '=' * total_columns
-
-
-class stable_version_modify(stable_version):
-    """atest stable_version modify --board <board> --version <version>
-
-    Change the stable version of a given board to the given value.
-    """
-
-    def __init__(self):
-        """Add to the parser the options common to all the
-        stable_version actions.
-        """
-        super(stable_version_modify, self).__init__()
-
-        self.parser.add_option('-i', '--version',
-                               help='Stable version.',
-                               type='string',
-                               metavar='VERSION')
-
-        self.topic_parse_info = topic_common.item_parse_info(
-                attribute_name='board', use_leftover=True)
-
-
-    def parse(self):
-        """Parse command arguments.
-        """
-        options,leftover = super(stable_version_modify, self).parse()
-
-        self.version = options.version
-        if not self.board or not self.version:
-            self.invalid_syntax('Both --board and --version arguments must be '
-                                'specified.')
-
-
-    def execute(self):
-        """Execute delete stable version action.
-        """
-        current_version = self.execute_rpc(op='get_stable_version',
-                                           board=self.board)
-        if current_version == self.version:
-            print ('Board %s already has stable version of %s.' %
-                   (self.board, self.version))
-            return
-
-        self.execute_rpc(op='set_stable_version', board=self.board,
-                         version=self.version)
-        print ('Stable version for board %s is changed from %s to %s.' %
-               (self.board, current_version, self.version))
-
-
-class stable_version_delete(stable_version):
-    """atest stable_version delete --board <board>
-
-    Delete a stable version entry in afe_stable_versions table for a given
-    board, so default stable version will be used.
-    """
-
-    def parse(self):
-        """Parse command arguments.
-        """
-        super(stable_version_delete, self).parse()
-        if not self.board:
-            self.invalid_syntax('`board` argument must be specified to delete '
-                                'a stable version entry.')
-        if self.board == 'DEFAULT':
-            self.invalid_syntax('Stable version for board DEFAULT can not be '
-                                'deleted.')
-
-
-    @topic_common.atest.require_confirmation(
-            'Are you sure to delete stable version for the given board?')
-    def execute(self):
-        """Execute delete stable version action.
-        """
-        self.execute_rpc(op='delete_stable_version', board=self.board)
-        print 'Stable version for board %s is deleted.' % self.board
-        default_stable_version = self.execute_rpc(op='get_stable_version')
-        print ('Stable version for board %s is default to %s' %
-               (self.board, default_stable_version))
diff --git a/cli/topic_common.py b/cli/topic_common.py
index 9a90c27..fc0a386 100644
--- a/cli/topic_common.py
+++ b/cli/topic_common.py
@@ -252,8 +252,7 @@
     Should only be instantiated by itself for usage
     references, otherwise, the <topic> objects should
     be used."""
-    msg_topic = ('[acl|host|job|label|shard|test|user|server|'
-                 'stable_version]')
+    msg_topic = '[acl|host|job|label|shard|test|user|server]'
     usage_action = '[action]'
     msg_items = ''