Drop remove_chunk

FORMAT GREEN ALBATROSS puts multiple chunks in a bag. This means that
removing an individual chunk can't happen without rewriting a bag, and
that would be disastrous for other reasons. Thus, we drop the
remove_chunk method from RepositoryInterface.

Format 6 still drops chunks when "obnam forget" is run.

For Green Albatross, we'll need to figure out some kind of garbage
collection for "obnam forget" (or
RepositoryInterface.remove_generation) to use, so that unused chunk
bags actually disappear. But they weren't disappearing correctly
before this change anyway.

1 files changed, 0 insertions, 14 deletions

diff --git a/obnamlib/fmt_ga/chunk_store.py b/obnamlib/fmt_ga/chunk_store.py
index 2476ad5d..f506f6e7 100644
--- a/obnamlib/fmt_ga/chunk_store.py
+++ b/obnamlib/fmt_ga/chunk_store.py
@@ -78,20 +78,6 @@ class GAChunkStore(object):
         bag_id, _ = obnamlib.parse_object_id(chunk_id)
         return self._bag_store.has_bag(bag_id)
 
-    def remove_chunk(self, chunk_id):
-        bag_id, _ = obnamlib.parse_object_id(chunk_id)
-        if self._bag is not None and bag_id == self._bag.get_id():
-            self._bag = None
-        else:
-            try:
-                self._bag_store.remove_bag(bag_id)
-            except (IOError, OSError) as e:
-                if e.errno == errno.ENOENT:
-                    raise obnamlib.RepositoryChunkDoesNotExist(
-                        chunk_id=chunk_id,
-                        filename=None)
-                raise
-
     def get_chunk_ids(self):
         result = []
         if self._bag: