Remove unused imports

src/BizHawk.Client.Common/CoreFileProvider.cs

@@ -1,7 +1,7 @@
 #nullable enable
 
 using System.Collections.Generic;
-using System.IO;
+
 using BizHawk.Common.PathExtensions;
 using BizHawk.Emulation.Common;
 

src/BizHawk.Client.EmuHawk/tools/Lua/LuaLibraries.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
-using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Reflection;

src/BizHawk.Common/Extensions/PathExtensions.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Text;
 using System.IO;
 using System.Reflection;