user/mesa-amber: Don't auto-install with mesa-dri

Since GBM is busted upstream, we can't use this for Wayland or Xorg.
I'm not sure what we are meant to be using it for, but we don't need
it available everywhere in this case.

user/mesa-amber/APKBUILD

@@ -14,7 +14,6 @@ makedepends="bison expat-dev flex libdrm-dev libglvnd-dev libx11-dev libxcb-dev
 	py3-markupsafe wayland-dev wayland-protocols xorgproto-dev zlib-dev
 	zstd-dev"
 subpackages=""
-install_if="mesa-dri"
 source="https://mesa.freedesktop.org/archive/mesa-$pkgver.tar.xz
 	big-endian-flipping.patch
 	mesa-amber-i915c.patch