Revert 265881 - "Add simple PRESUBMIT check to ensure that all files ending with .json can"

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 3c1b7ff9fde749fa54dd63239a193a5090878ded..67d55784370af84d31bed60125693639449c3d1f 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -1062,21 +1062,6 @@ def _CheckUserActionUpdate(input_api, output_api):
   return []
 
 
-def _CheckJSONParsability(input_api, output_api):
-  results = []
-  file_filter = lambda f: f.LocalPath().endswith('.json')
-  for fpath in input_api.AffectedFiles(file_filter=file_filter):
-    with open(fpath.LocalPath(), 'r') as f:
-      try:
-        input_api.json.load(f)
-      except ValueError as e:
-        results.append(output_api.PresubmitError(
-          "File %r does not parse as valid JSON:\n    %s"
-          % (fpath.LocalPath(), e.args[0])
-        ))
-  return results
-
-
 def _CheckJavaStyle(input_api, output_api):
   """Runs checkstyle on changed java files and returns errors if any exist."""
   original_sys_path = sys.path
@@ -1127,7 +1112,6 @@ def _CommonChecks(input_api, output_api):
   results.extend(_CheckForAnonymousVariables(input_api, output_api))
   results.extend(_CheckCygwinShell(input_api, output_api))
   results.extend(_CheckUserActionUpdate(input_api, output_api))
-  results.extend(_CheckJSONParsability(input_api, output_api))
 
   if any('PRESUBMIT.py' == f.LocalPath() for f in input_api.AffectedFiles()):
     results.extend(input_api.canned_checks.RunUnitTestsInDirectory(