Remove obsolete deprecated status for REF generator script.

Source/build/scripts/audit_runtime_enabled_features.py

 #!/usr/bin/env python
 
 import requests
 import re
 from in_file import InFile
 
 BRANCH_FORMAT = "https://src.chromium.org/blink/branches/chromium/%s/%s"
 TRUNK_PATH = "Source/platform/RuntimeEnabledFeatures.in"
 TRUNK_URL = "https://src.chromium.org/blink/trunk/%s" % TRUNK_PATH
 
 
 def features_path(branch):
     # RuntimeEnabledFeatures has only existed since April 2013:
     if branch <= 1453:
         return None
     # Source/core/page/RuntimeEnabledFeatures.in existed by 1547
     # but was in an old format without status= arguments.
     if branch <= 1547:
         return None
     if branch <= 1650:
         return "Source/core/page/RuntimeEnabledFeatures.in"
     # Modern location:
     return TRUNK_PATH
 
 
 def parse_features_file(features_text):
     valid_values = {
-        'status': ['stable', 'experimental', 'deprecated', 'test'],
+        'status': ['stable', 'experimental', 'test'],
     }
     defaults = {
         'condition': None,
         'depends_on': [],
         'custom': False,
         'status': None,
     }
 
     # FIXME: in_file.py manually calls str.strip so conver to str here.
     features_lines = str(features_text).split("\n")
@@ skipping 128 matching lines @@
     for version, feature_file in historical_tuples + active_tuples:
         auditor.add_version(version, feature_file)
 
     print "\nConsider for removal (have been stable for at least one release):"
     for feature in stale_features(historical_tuples):
         print feature
 
 
 if __name__ == "__main__":
     main()