games-util/grfcodec: fix missync with live

This hunk isn't needed for non-live as we still have a CMake patch dropping that
part.

(For live, I dropped the patch as part of it got fixed upstream and
didn't seem worth keeping then.)

Closes: https://bugs.gentoo.org/948925
Signed-off-by: Sam James <sam@gentoo.org>

games-util/grfcodec/grfcodec-6.1.0-r1.ebuild

@@ -32,9 +32,3 @@ PATCHES=(
 	# Bug #894648
 	"${FILESDIR}"/${PN}-6.0.6_p20230811-no-fortify-source.patch
 )
-
-src_install() {
-	cmake_src_install
-
-	rm "${ED}"/usr/share/doc/${PF}/COPYING || die
-}