test list: remove "DescribeTestLists"

This function is now basically:

  (lambda test_lists: "%r" % sorted(test_lists.keys()))

which can be done by the caller itself.

BUG=chromium:758115
TEST=None

Change-Id: Iff1daa3dbd349fbc9e85d1cf15368bc0486b6bf3
Reviewed-on: https://chromium-review.googlesource.com/688936
Commit-Ready: Wei-Han Chen <stimim@chromium.org>
Tested-by: Wei-Han Chen <stimim@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
diff --git a/py/goofy/goofy.py b/py/goofy/goofy.py
index a96e945..6e8bff3 100755
--- a/py/goofy/goofy.py
+++ b/py/goofy/goofy.py
@@ -860,8 +860,8 @@
       return self.test_lists[test_list_id]
     except KeyError:
       raise test_lists.TestListError(
-          '%r is not a valid test list ID (available IDs are [%s])' % (
-              test_list_id, ', '.join(sorted(self.test_lists.keys()))))
+          '%r is not a valid test list ID (available IDs are %r)' % (
+              test_list_id, sorted(self.test_lists.keys())))
 
   def _RecordStartError(self, error_message):
     """Appends the startup error message into the shared data."""
@@ -880,8 +880,7 @@
 
     self.test_lists, failed_files = self.test_list_manager.BuildAllTestLists()
 
-    logging.info('Loaded test lists: [%s]',
-                 test_lists.DescribeTestLists(self.test_lists))
+    logging.info('Loaded test lists: %r', sorted(self.test_lists.keys()))
 
     # Check for any syntax errors in test list files.
     if failed_files:
diff --git a/py/test/test_lists/test_lists.py b/py/test/test_lists/test_lists.py
index 5f4bcb7..550aafa 100644
--- a/py/test/test_lists/test_lists.py
+++ b/py/test/test_lists/test_lists.py
@@ -282,19 +282,3 @@
   finally:
     popped = builder_state.stack.pop()
     assert test_list == popped
-
-
-def DescribeTestLists(test_lists):
-  """Returns a friendly description of a dict of test_lists.
-
-  Args:
-    test_lists: A dict of test_list_id->test_lists (as returned by
-        BuildAllTestLists)
-
-  Returns:
-    A string like "bar, foo (old-style), main".
-  """
-  ret = []
-  for k in sorted(test_lists.keys()):
-    ret.append(k)
-  return ', '.join(ret)