remove TODO (now moved to issues)

TODO.txt

@@ -1,18 +0,0 @@
-* move rebuild_working_set logic to replica.rs, also include states !=
-  completed / deleted
-* [WIP] assign types to properties in Replica
-  - db / operation model is just k/v, but formatted names can be used for
-    structure:
-    - dependencies: `dependency.<uuid> = ""`
-    - annotations: `annotation.<epoch time> = "annotation"`
-    - tags: `tags.<tag> = ""`
-* abstract server into trait
-* add HTTP API
-* fix TODO items in replica.rs
-* implement snapshot requests
-* implement backups
-* implement client-side encryption
-* design expiration
-  - need to be sure that create / delete operations don't get reversed
-* cli tools
-* move test-only tools somewhere else (helpers in tests/?)