FcDirCacheClean
Name
FcDirCacheClean -- This tries to clean up the cache directory of 
cache_dir.
This returns FcTrue if the operation is successfully complete. otherwise FcFalse.
Synopsis
| #include <fontconfig/fontconfig.h>
	 | 
FcBool FcDirCacheClean(const FcChar8 *cache_dir, FcBoolverbose);