Remove cached global ICodeDataLogger (emu core) in CDL (fixes #2553)

fixes 234642ed0; this was never going to work because the setter will only be
called by `ServiceInjector.UpdateServices` during a core restart, at which time
the previous core should already have been `Dispose`d. If you want to call
`.SetCDL(null)` on the core when restarting (even though closing the CDL window
already does that three times?), do it in the core's `Dispose` implementation.

src/BizHawk.Client.EmuHawk/tools/CDL.cs

@@ -49,18 +49,8 @@ namespace BizHawk.Client.EmuHawk
 		[RequiredService]
 		private IMemoryDomains MemoryDomains { get; set; }
 
-		private ICodeDataLogger _icdlogger;
-
 		[RequiredService]
-		private ICodeDataLogger CodeDataLogger
-		{
-			get => _icdlogger;
-			set
-			{
-				_icdlogger?.SetCDL(null);
-				_icdlogger = value;
-			}
-		}
+		private ICodeDataLogger CodeDataLogger { get; set; }
 
 		private string _currentFilename;
 		private CodeDataLog _cdl;