util/crossgcc: Remove binutils related MIPS patch

coreboot doesn't support the MIPS architecture anymore. So remove the
MIPS patch.

Change-Id: I62a2bca141b42ac33b628c48c84422570f4dda10
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66921
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

util/crossgcc/patches/binutils-2.37_mips-gold.patch

@@ -1,11 +0,0 @@
-diff -urN binutils-2.32.orig/gold/configure.tgt binutils-2.32/gold/configure.tgt
---- binutils-2.32.orig/gold/configure.tgt
-+++ binutils-2.32/gold/configure.tgt
-@@ -157,6 +157,7 @@
-  targ_obj=mips
-  targ_machine=EM_MIPS_RS3_LE
-  targ_size=32
-+ targ_extra_size=64
-  targ_big_endian=false
-  targ_extra_big_endian=true
-  ;;