Waiting till post MR0 - this impacts signing tools for MR0.

Revert "Modify release tools to replace certs in MMAC files."

This reverts commit a6e0466ab5.

Change-Id: Ib7819185bad119013f307ce4301d5f02190e14ed

tools/releasetools/common.py

@@ -954,18 +954,3 @@ def GetTypeAndDevice(mount_point, info):
     return PARTITION_TYPES[fstab[mount_point].fs_type], fstab[mount_point].device
   else:
     return None
-
-
-def ParseCertificate(data):
-  """Parse a PEM-format certificate."""
-  cert = []
-  save = False
-  for line in data.split("\n"):
-    if "--END CERTIFICATE--" in line:
-      break
-    if save:
-      cert.append(line)
-    if "--BEGIN CERTIFICATE--" in line:
-      save = True
-  cert = "".join(cert).decode('base64')
-  return cert