FcPatternRemove − Remove one object of the specified type from the pattern
#include <fontconfig/fontconfig.h>
FcBool FcPatternRemove (FcPattern *p, const char *object, int id);
Removes the value associated with the property ‘object’ at position ‘id’, returning whether the property existed and had a value at that position or not.
Fontconfig version 2.10.95