Remove @pphaneuf from CODEOWNERS

Author: roger2hk

CODEOWNERS

@@ -10,12 +10,12 @@
 # review when someone opens a pull request.
 *                                @google/trillian-team
 
-/*.proto                         @mhutchinson @AlCutter @pphaneuf
-/storage/storagepb/storage.proto @mhutchinson @AlCutter @pphaneuf
+/*.proto                         @mhutchinson @AlCutter
+/storage/storagepb/storage.proto @mhutchinson @AlCutter
 
 # Mitigation for https://github.com/google/trillian/issues/1297
 # Folks to watch out for hanges to DB schemas and ensure that
 # there's a note added in a sensible location about how to
 # upgrade schema instances.
-/storage/mysql/schema/*          @mhutchinson @AlCutter @pphaneuf
-/storage/cloudspanner/spanner.sdl @mhutchinson @AlCutter @pphaneuf
+/storage/mysql/schema/*          @mhutchinson @AlCutter
+/storage/cloudspanner/spanner.sdl @mhutchinson @AlCutter