general: Remove unused files

We were keeping around a very outdated TODO file
and a very old screenshot from before the app was
named Fractal.

At this point, neither of these files are needed.

TODO

@@ -1,27 +0,0 @@
-Fixs:
-    * Make it work to download a file with only one click, I don't know why
-      with text files I need to click several times to open it... Maybe we
-      should show a "save as" dialog to save the file instead of trying to
-      open with xdg-open.
-
-    * Ignore launched threads when changing room...
-    * Sort rooms by last message or fav?
-
-    * Load more should work with search, currently loads the room messages,
-      but not continues with the search
-
-Functionality:
-
-    * Show event messages in message list
-    * Register
-    * Room creation
-    * Change user display name
-    * Change user avatar
-    * Store last read message to show differently
-
-Events to manage:
-    * Join / leave from current user
-    * Invite event
-
-Encription:
-    https://matrix.org/docs/guides/e2e_implementation.html