package/gcc: remove legacy leftover for PR60102

Commit 2c8de6c4 (gcc 4.9.1: add patch for PR60102) removed the SPE
condition becasue of said PR, but forgot to remove the associated
comment, which has been tagging along all this time...

Remove it, it is no longer valid and causes confusion.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/Config.in.host

@@ -39,7 +39,6 @@ config BR2_GCC_VERSION_4_9_X
 	depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_powerpc64 || BR2_powerpc64le))
 	# musl mips64 unsupported
 	depends on !(BR2_TOOLCHAIN_USES_MUSL && (BR2_mips64 || BR2_mips64el))
-	# PR60102 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 
 config BR2_GCC_VERSION_5_X