release.py: remove 1.12 from supported release lines.
@@ -105,7 +105,7 @@ tool_versions['trunk'] = tool_versions['1.10']
# ### TODO: derive this from svn_version.h; see ../../build/getversion.py
recommended_release = '1.13'
# For clean-dist, a whitelist of artifacts to keep, by version.
-supported_release_lines = frozenset({"1.9", "1.10", "1.12", "1.13"})
+supported_release_lines = frozenset({"1.9", "1.10", "1.13"})
# Some constants
svn_repos = os.getenv('SVN_RELEASE_SVN_REPOS',
