clean up abstraction

core/app.py

@@ -295,7 +295,7 @@ class DupeGuru(Broadcaster):
     def _job_completed(self, jobid):
         if jobid == JobType.SCAN:
             self._results_changed()
-            self.directories.save_hashes()
+            fs.filesdb.commit()
             if not self.results.groups:
                 self.view.show_message(tr("No duplicates found."))
             else:

core/directories.py

@@ -286,9 +286,6 @@ class Directories:
             tree = ET.ElementTree(root)
             tree.write(fp, encoding="utf-8")
 
-    def save_hashes(self):
-        fs.filesdb.commit()
-
     def set_state(self, path, state):
         """Set the state of folder at ``path``.