Remove upstreamed Cairo patch

[danyeaw]

This patch was upstreamed with https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/520 and released in Cairo 1.18.2. The patch wasn't failing, instead it was creating a 2nd include line a few lines down:

#include <string.h>

#ifdef _MSC_VER
#include <malloc.h>
#endif

#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif

#ifdef _MSC_VER
#include <malloc.h>
#endif

#if HAVE_FT_COLR_V1

[nacho]

Thanks