Set C64 to released, and remove some hacks that hid C64 in some places

BizHawk.Client.EmuHawk/config/PathConfig.cs

@@ -21,7 +21,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			string[] coresToHide = { "C64" };
+			string[] coresToHide = { };
 
 			foreach (var core in coresToHide)
 			{

BizHawk.Emulation.Common/SystemLookup.cs

@@ -50,18 +50,7 @@ namespace BizHawk.Emulation.Common
 			}
 		}
 
-		public IEnumerable<SystemInfo> AllSystems
-		{
-			get
-			{
-				if (VersionInfo.DeveloperBuild)
-				{
-					return _systems;
-				}
-
-				return _systems.Where(s => s.SystemId != "C64");
-			}
-		}
+		public IEnumerable<SystemInfo> AllSystems => _systems;
 
 		public class SystemInfo
 		{

BizHawk.Emulation.Cores/Computers/Commodore64/C64.cs

@@ -13,7 +13,7 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64
 		"C64Hawk",
 		"SaxxonPike",
 		isPorted: false,
-		isReleased: false)]
+		isReleased: true)]
 	public sealed partial class C64 : IEmulator, IRegionable, IBoardInfo
 	{
 		public C64(CoreComm comm, IEnumerable<byte[]> roms, GameInfo game, object settings, object syncSettings)