mpfr: remove patch no longer needed

package/mpfr/patches/patch-src_mpfr-longlong_h

@@ -1,11 +0,0 @@
---- mpfr-3.1.2.orig/src/mpfr-longlong.h	2013-03-13 16:37:32.000000000 +0100
-+++ mpfr-3.1.2/src/mpfr-longlong.h	2014-01-06 16:29:39.854354889 +0100
-@@ -1043,7 +1043,7 @@ extern UWtype __MPN(udiv_qrnnd) _PROTO (
- #define UDIV_TIME 100
- #endif /* __mips */
- 
--#if (defined (__mips) && __mips >= 3) && W_TYPE_SIZE == 64
-+#if (defined (__mips) && __mips >= 3) && W_TYPE_SIZE == 64 && defined (_LP64)
- #if __GMP_GNUC_PREREQ (4,4)
- #define umul_ppmm(w1, w0, u, v) \
-   do {									\