Update localization_manager.py

Remove duplicate signal bindings

Author: woshimajintao

annotation_tool/controllers/localization/localization_manager.py

@@ -42,7 +42,6 @@ def __init__(self, main_window):
     def setup_connections(self):
         # --- Left Panel ---
         pc = self.left_panel.project_controls
-        pc.loadRequested.connect(self._on_load_clicked)
         pc.addVideoRequested.connect(self._on_add_video_clicked)
         pc.saveRequested.connect(self._on_save_clicked)
         pc.exportRequested.connect(self._on_export_clicked)
@@ -487,4 +486,4 @@ def _fmt_ms_full(self, ms):
         s = ms // 1000
         m = s // 60
         h = m // 60
-        return f"{h:02}:{m%60:02}:{s%60:02}.{ms%1000:03}"
+        return f"{h:02}:{m%60:02}:{s%60:02}.{ms%1000:03}"