stop using saved state

We can reconstruct the state based on log messages. Otherwise,
it's incorrect as the trimming function removes exported parts
anyway and then we have missing commits

lib/git_exporter.py

@@ -40,7 +40,6 @@ class GitExporter:
         else:
             self.git.create()
             self.git.add_gitea_remote(package)
-        self.state_file = os.path.join(self.git.path, ".git", "_flat_state.yaml")
         self.gc_interval = 200
         self.cachedir = cachedir
 
@@ -105,13 +104,6 @@ class GitExporter:
         return state_data
 
     def check_repo_state(self, flats, branch_state, branch):
-        state_data = dict()
-        if os.path.exists(self.state_file):
-            with open(self.state_file) as f:
-                state_data = yaml.safe_load(f)
-                if not isinstance(state_data, dict):
-                    state_data = {}
-        else:
         state_data = self.reconstruct_state(flats)
 
         logging.debug(f"state data: {state_data}")
@@ -278,10 +270,3 @@ class GitExporter:
         )
         flat.commit.git_commit = commit
         branch_state[flat.branch] = flat.commit
-        with open(self.state_file, "w") as f:
-            data = {}
-            for branch in ["factory", "devel"]:
-                commit = branch_state[branch]
-                if commit:
-                    data[branch] = commit.dbid
-            yaml.dump(data, f)