CMake: remove lines for MinGW, no one is maintaining those

CMakeLists.txt

@@ -722,22 +722,6 @@ if (WIN32)
     endif (BUILD_OPENCS)
   endif(MSVC)
 
-  # Same for MinGW
-  if (MINGW)
-    if (USE_DEBUG_CONSOLE)
-      set_target_properties(openmw PROPERTIES LINK_FLAGS_DEBUG "-Wl,-subsystem,console")
-      set_target_properties(openmw PROPERTIES LINK_FLAGS_RELWITHDEBINFO "-Wl,-subsystem,console")
-      set_target_properties(openmw PROPERTIES COMPILE_DEFINITIONS_DEBUG "_CONSOLE")
-    else(USE_DEBUG_CONSOLE)
-      set_target_properties(openmw PROPERTIES LINK_FLAGS_DEBUG "-Wl,-subsystem,windows")
-      set_target_properties(openmw PROPERTIES LINK_FLAGS_RELWITHDEBINFO "-Wl,-subsystem,windows")
-    endif(USE_DEBUG_CONSOLE)
-
-    set_target_properties(openmw PROPERTIES LINK_FLAGS_RELEASE "-Wl,-subsystem,console")
-    set_target_properties(openmw PROPERTIES LINK_FLAGS_MINSIZEREL "-Wl,-subsystem,console")
-    set_target_properties(openmw PROPERTIES COMPILE_DEFINITIONS_RELEASE "_CONSOLE")
-  endif(MINGW)
-
   # TODO: At some point release builds should not use the console but rather write to a log file
   #set_target_properties(openmw PROPERTIES LINK_FLAGS_RELEASE "/SUBSYSTEM:WINDOWS")
   #set_target_properties(openmw PROPERTIES LINK_FLAGS_MINSIZEREL "/SUBSYSTEM:WINDOWS")