Get rid of unused function warning for `_WIN32`

file.c

@@ -3355,7 +3355,6 @@ getcwdofdrv(int drv)
     }
     return drvcwd;
 }
-#endif
 
 static inline int
 not_same_drive(VALUE path, int drive)
@@ -3370,6 +3369,7 @@ not_same_drive(VALUE path, int drive)
     }
 }
 #endif
+#endif
 
 static inline char *
 skiproot(const char *path, const char *end, rb_encoding *enc)