Revert "Add presubmit check for changes in 3pp"

This reverts commit 4103b383505575b23222f77fd04116d2f6c10273.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Add presubmit check for changes in 3pp
> 
> Presubmit check will test will new changes be overriden by autoroll
> or not. In more details presubmit will check:
> 1. Each dependency in third_party have to be specified in one of:
>    a. THIRD_PARTY_CHROMIUM_DEPS.json
>    b. THIRD_PARTY_WEBRTC_DEPS.json
> 2. Each dependency not specified in both files from #1
> 3. Changes won't be overriden by chromium third_party deps autoroll:
>    a. Changes were made in WebRTC owned dependency
>    b. Changes were addition of new Chromium owned dependency
> 
> Bug: webrtc:8366
> Change-Id: Ic5db24289e7fa461e0959f75cfbe81ecc65af4b5
> Reviewed-on: https://webrtc-review.googlesource.com/77421
> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
> Commit-Queue: Artem Titov <titovartem@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#23301}

TBR=phoglund@webrtc.org,kwiberg@webrtc.org,titovartem@webrtc.org

Change-Id: Ib016ee4ac58729c2c0d302a964dbac71b4ae64af
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:8366
Reviewed-on: https://webrtc-review.googlesource.com/77780
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23302}
diff --git a/presubmit_test_mocks.py b/presubmit_test_mocks.py
index 6c0b0c4..4b2b3c7 100644
--- a/presubmit_test_mocks.py
+++ b/presubmit_test_mocks.py
@@ -9,9 +9,6 @@
 # This file is inspired to [1].
 # [1] - https://cs.chromium.org/chromium/src/PRESUBMIT_test_mocks.py
 
-import os.path
-import re
-
 
 class MockInputApi(object):
   """Mock class for the InputApi class.
@@ -23,38 +20,10 @@
   def __init__(self):
     self.change = MockChange([], [])
     self.files = []
-    self.presubmit_local_path = os.path.dirname(__file__)
 
   def AffectedSourceFiles(self, file_filter=None):
-    return self.AffectedFiles(file_filter=file_filter)
-
-  def AffectedFiles(self, file_filter=None, include_deletes=False):
-    for f in self.files:
-      if file_filter and not file_filter(f):
-        continue
-      if not include_deletes and f.Action() == 'D':
-        continue
-      yield f
-
-  @classmethod
-  def FilterSourceFile(cls, affected_file, white_list=(), black_list=()):
-    local_path = affected_file.LocalPath()
-    found_in_white_list = not white_list
-    if white_list:
-      for pattern in white_list:
-        compiled_pattern = re.compile(pattern)
-        if compiled_pattern.search(local_path):
-          found_in_white_list = True
-          break
-    if black_list:
-      for pattern in black_list:
-        compiled_pattern = re.compile(pattern)
-        if compiled_pattern.search(local_path):
-          return False
-    return found_in_white_list
-
-  def PresubmitLocalPath(self):
-    return self.presubmit_local_path
+    # pylint: disable=unused-argument
+    return self.files
 
   def ReadFile(self, affected_file, mode='rU'):
     filename = affected_file.AbsoluteLocalPath()
@@ -110,30 +79,11 @@
   MockInputApi for presubmit unittests.
   """
 
-  def __init__(self, local_path, new_contents=None, old_contents=None,
-      action='A'):
-    if new_contents is None:
-      new_contents = ["Data"]
+  def __init__(self, local_path):
     self._local_path = local_path
-    self._new_contents = new_contents
-    self._changed_contents = [(i + 1, l) for i, l in enumerate(new_contents)]
-    self._action = action
-    self._old_contents = old_contents
-
-  def Action(self):
-    return self._action
-
-  def ChangedContents(self):
-    return self._changed_contents
-
-  def NewContents(self):
-    return self._new_contents
 
   def LocalPath(self):
     return self._local_path
 
   def AbsoluteLocalPath(self):
     return self._local_path
-
-  def OldContents(self):
-    return self._old_contents