Removing unused signals from a previous merge that left them behind.

Author: jonoomph

src/windows/main_window.py

@@ -106,9 +106,6 @@ class MainWindow(updates.UpdateWatcher, QMainWindow):
     WaveformReady = pyqtSignal(str, list)
     TransformSignal = pyqtSignal(str)
     SelectRegionSignal = pyqtSignal(str)
-    ExportStarted = pyqtSignal(str, int, int)
-    ExportFrame = pyqtSignal(str, int, int, int, str)
-    ExportEnded = pyqtSignal(str)
     MaxSizeChanged = pyqtSignal(object)
     InsertKeyframe = pyqtSignal(object)
     OpenProjectSignal = pyqtSignal(str)