[autotest] Deprecate the use of site_parse

Some digging through the git history shows that
site_parse was introduced to generate a json file about the test results
and crash reports, which was later included in an email sent out
by the old dashboard (see crbug.com/196118). Since we've completedly
deprecated the old dashboard (crosreview.com/220690), there is no
point to call site_parse any more.

And since around Nov, 2013, we actually has stopped calling site_parser
anyway because the import_site_function has been failing to
load site_parser. Search scheduler logs you'll see tko/parser is called
currently. So it won't harm to just remove the dead code
that is trying to call site_parser.

This will also simplify the measuring of duration of parsing (no need
to take care of site_parser)

BUG=chromium:422581
TEST=run scheduler locally. run run_suite.
DEPLOY=scheduler

Change-Id: I2232f245ab9e532c18bce723fb559617e6dab121
Reviewed-on: https://chromium-review.googlesource.com/224844
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Fang Deng <fdeng@chromium.org>
Tested-by: Fang Deng <fdeng@chromium.org>
diff --git a/scheduler/postjob_task.py b/scheduler/postjob_task.py
index e38a06b..1ca602b 100644
--- a/scheduler/postjob_task.py
+++ b/scheduler/postjob_task.py
@@ -18,8 +18,7 @@
 from autotest_lib.server import autoserv_utils
 
 
-_parser_path = autoserv_utils._parser_path_func(
-                autoserv_utils.AUTOTEST_INSTALL_DIR)
+_parser_path = os.path.join(drones.AUTOTEST_INSTALL_DIR, 'tko', 'parse')
 
 
 class PostJobTask(agent_task.AgentTask):