Adjust resource path to quake3.ico

I'm aware this probably breaks the MSVC build, but

a) I think it's probably broken already
b) I have good reasons that will hopefully make this a non-issue anyway

code/sys/win_resource.rc

@@ -53,11 +53,7 @@ END
 
 // Icon with lowest ID value placed first to ensure application icon
 // remains consistent on all systems.
-#ifndef __MINGW32__
-IDI_ICON1               ICON    DISCARDABLE     "../quake3.ico"
-#else
-IDI_ICON1               ICON    DISCARDABLE     "misc/quake3.ico"
-#endif
+IDI_ICON1               ICON    DISCARDABLE     "quake3.ico"
 
 
 /////////////////////////////////////////////////////////////////////////////