osdep/path: remove ifdefs

They're not really needed, so kill them.

osdep/path.h

@@ -1,15 +1,9 @@
 #ifndef OSDEP_PATH_H
 #define OSDEP_PATH_H
 
-#include "config.h"
-
-#ifdef _WIN32
 char *mp_get_win_config_path(const char *filename);
-#endif
 
-#ifdef CONFIG_COCOA
 // Returns absolute path of a resource file in a Mac OS X application bundle.
 char *mp_get_macosx_bundled_path(const char *filename);
-#endif
 
 #endif