Only smp runtimes are built for vxworks7*, even though the -smp suffix
is removed during install. This change removes unused system packages
for rtp runtimes.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* libgnat/system-vxworks7-ppc-rtp.ads: Remove
* libgnat/system
Only smp runtimes are built for vxworks7*, even though the -smp suffix
is removed during install. Therefore, in general, the build macros for
the non-smp runtimes are superfluous except on the legacy ppc-vxworks6
target where both the smp and non-smp runtime are built. Lastly, an
error message is
