fix compile error, some nitpick cleanups

BizHawk.Client.Common/BitmapBufferVideoProvider.cs

@@ -20,10 +20,7 @@ namespace BizHawk.Client.Common
 			_bb = null;
 		}
 
-		public int[] GetVideoBuffer()
-		{
-			return _bb.Pixels;
-		}
+		public int[] GetVideoBuffer() => _bb.Pixels;
 
 		public int VirtualWidth => _bb.Width;
 

BizHawk.Client.Common/inputAdapters/ClickyVirtualPadController.cs

@@ -10,38 +10,23 @@ namespace BizHawk.Client.Common
 	/// </summary>
 	public class ClickyVirtualPadController : IController
 	{
+		private readonly HashSet<string> _pressed = new HashSet<string>();
+
 		public ControllerDefinition Definition { get; set; }
 
-		public bool IsPressed(string button)
-		{
-			return _pressed.Contains(button);
-		}
+		public bool IsPressed(string button) => _pressed.Contains(button);
 
-		public float AxisValue(string name)
-		{
-			return 0.0f;
-		}
+		public float AxisValue(string name) => 0.0f;
 
 		/// <summary>
 		/// Call this once per frame to do the timekeeping for the hold and release
 		/// </summary>
-		public void FrameTick()
-		{
-			_pressed.Clear();
-		}
+		public void FrameTick() => _pressed.Clear();
 
 		/// <summary>
 		/// Call this to hold the button down for one frame
 		/// </summary>
-		public void Click(string button)
-		{
-			_pressed.Add(button);
-		}
-
-		public void Unclick(string button)
-		{
-			_pressed.Remove(button);
-		}
+		public void Click(string button) => _pressed.Add(button);
 
 		public void Toggle(string button)
 		{
@@ -66,7 +51,5 @@ namespace BizHawk.Client.Common
 				_pressed.Add(button);
 			}
 		}
-
-		private readonly HashSet<string> _pressed = new HashSet<string>();
 	}
 }

BizHawk.Client.Common/inputAdapters/CopyController.cs

@@ -9,15 +9,9 @@ namespace BizHawk.Client.Common
 	{
 		public ControllerDefinition Definition => Curr.Definition;
 
-		public bool IsPressed(string button)
-		{
-			return Curr.IsPressed(button);
-		}
+		public bool IsPressed(string button) => Curr.IsPressed(button);
 
-		public float AxisValue(string name)
-		{
-			return Curr.AxisValue(name);
-		}
+		public float AxisValue(string name) => Curr.AxisValue(name);
 
 		public IController Source { get; set; }
 

BizHawk.Client.Common/inputAdapters/OverrideAdapter.cs

@@ -32,7 +32,6 @@ namespace BizHawk.Client.Common
 			=> _axisOverrides.ContainsKey(name)
 				? _axisOverrides[name]
 				: 0.0F;
-		
 
 		public IEnumerable<string> Overrides => _overrides.Select(kvp => kvp.Key);
 

BizHawk.Client.Common/inputAdapters/SimpleController.cs

@@ -27,15 +27,9 @@ namespace BizHawk.Client.Common
 			set => Buttons[button] = value;
 		}
 
-		public virtual bool IsPressed(string button)
-		{
-			return this[button];
-		}
+		public virtual bool IsPressed(string button) => this[button];
 
-		public float AxisValue(string name)
-		{
-			return Axes[name];
-		}
+		public float AxisValue(string name) => Axes[name];
 
 		public IEnumerable<KeyValuePair<string, bool>> BoolButtons()
 		{

BizHawk.Client.EmuHawk/tools/Lua/LuaRegisteredFunctionsList.cs

@@ -107,7 +107,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void RemoveAllBtn_Click(object sender, EventArgs e)
 		{
-			_registeredFunctions.Clear();
+			_registeredFunctions.Clear(Global.Emulator); // TODO: don't use Global
 			PopulateListView();
 		}