tuklib_physmem: Clean up disabled code

src/common/tuklib_physmem.c

@@ -91,18 +91,11 @@ tuklib_physmem(void)
 		// supports reporting values greater than 4 GiB. To keep the
 		// code working also on older Windows versions, use
 		// GlobalMemoryStatusEx() conditionally.
-		HMODULE kernel32 = GetModuleHandle(TEXT("kernel32.dll"));
+		HMODULE kernel32 = GetModuleHandleA("kernel32.dll");
 		if (kernel32 != NULL) {
 			typedef BOOL (WINAPI *gmse_type)(LPMEMORYSTATUSEX);
-#ifdef CAN_DISABLE_WCAST_FUNCTION_TYPE
-#	pragma GCC diagnostic push
-#	pragma GCC diagnostic ignored "-Wcast-function-type"
-#endif
 			gmse_type gmse = (gmse_type)GetProcAddress(
 					kernel32, "GlobalMemoryStatusEx");
-#ifdef CAN_DISABLE_WCAST_FUNCTION_TYPE
-#	pragma GCC diagnostic pop
-#endif
 			if (gmse != NULL) {
 				MEMORYSTATUSEX meminfo;
 				meminfo.dwLength = sizeof(meminfo);