remove outdated bk2 "scrub" hotkey, this is an obscure feature that is non-trivial to use, but a higly trivial thing to do in tastudio

src/BizHawk.Client.Common/config/Binding.cs

@@ -191,7 +191,6 @@ namespace BizHawk.Client.Common
 						Bind("Movie", "MT Select None"),
 						Bind("Movie", "MT Increment Player"),
 						Bind("Movie", "MT Decrement Player"),
-						Bind("Movie", "Scrub Input"),
 
 						Bind("Tools", "RAM Watch"),
 						Bind("Tools", "RAM Search"),

src/BizHawk.Client.Common/movie/MovieSession.cs

@@ -87,18 +87,6 @@ namespace BizHawk.Client.Common
 				{
 					HandleFrameLoopForRecordMode();
 				}
-				else
-				{
-					// Movie may go into finished mode as a result from latching
-					if (!Movie.IsFinished())
-					{
-						if (Global.InputManager.ClientControls.IsPressed("Scrub Input"))
-						{
-							LatchInputToUser();
-							ClearFrame();
-						}
-					}
-				}
 			}
 			else if (Movie.IsRecording())
 			{
@@ -350,16 +338,6 @@ namespace BizHawk.Client.Common
 			return new Bk2Movie(this, path);
 		}
 
-
-		private void ClearFrame()
-		{
-			if (Movie.IsPlayingOrFinished())
-			{
-				Movie.ClearFrame(Movie.Emulator.Frame);
-				Output($"Scrubbed input at frame {Movie.Emulator.Frame}");
-			}
-		}
-
 		private void PopupMessage(string message)
 		{
 			_popupCallback?.Invoke(message);

src/BizHawk.Client.Common/movie/bk2/Bk2Movie.cs

@@ -160,13 +160,6 @@ namespace BizHawk.Client.Common
 			Changes = true;
 		}
 
-		public virtual void ClearFrame(int frame)
-		{
-			var lg = LogGeneratorInstance(Session.MovieController);
-			SetFrameAt(frame, lg.EmptyEntry);
-			Changes = true;
-		}
-
 		protected void SetFrameAt(int frameNum, string frame)
 		{
 			if (Log.Count > frameNum)

src/BizHawk.Client.Common/movie/interfaces/IMovie.cs

@@ -188,11 +188,6 @@ namespace BizHawk.Client.Common
 		/// </summary>
 		void FinishedMode();
 
-		/// <summary>
-		/// Replaces the given frame's input with an empty frame
-		/// </summary>
-		void ClearFrame(int frame);
-		
 		/// <summary>
 		/// Adds the given input to the movie
 		/// Note: this edits the input log without the normal movie recording logic applied

src/BizHawk.Client.Common/movie/interfaces/ITasMovie.cs

@@ -27,6 +27,11 @@ namespace BizHawk.Client.Common
 		void FlagChanges();
 		void ClearChanges();
 
+		/// <summary>
+		/// Replaces the given frame's input with an empty frame
+		/// </summary>
+		void ClearFrame(int frame);
+
 		void GreenzoneCurrentFrame();
 		void ToggleBoolState(int frame, string buttonName);
 		void SetAxisState(int frame, string buttonName, int val);

src/BizHawk.Client.Common/movie/tasproj/TasMovie.Editing.cs

@@ -78,13 +78,15 @@ namespace BizHawk.Client.Common
 			ChangeLog.SetGeneralRedo();
 		}
 
-		public override void ClearFrame(int frame)
+		public void ClearFrame(int frame)
 		{
 			ChangeLog.AddGeneralUndo(frame, frame, $"Clear Frame: {frame}");
 
-			base.ClearFrame(frame);
-			InvalidateAfter(frame);
+			var lg = LogGeneratorInstance(Session.MovieController);
+			SetFrameAt(frame, lg.EmptyEntry);
+			Changes = true;
 
+			InvalidateAfter(frame);
 			ChangeLog.SetGeneralRedo();
 		}