We don't actually need this anymore. We were previously using it to find ccache, but Meson will do this for us. Now that we pass -Wl,--fatal-warnings, we don't need to pass -Werror to the link stage either. This removes two shell execs, one subshell, and one call to each of grep and printf, per compile. Signed-off-by: Daniel Stone <daniels@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33137>