opal/common: remove stale common components

The verbs and verbs_usnic components are now no longer necessary / no
longer used anywhere in the code base.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

Author: jsquyres

VERSION

@@ -114,4 +114,3 @@ libmca_opal_common_ofi_so_version=0:0:0
 libmca_opal_common_sm_so_version=0:0:0
 libmca_opal_common_ucx_so_version=0:0:0
 libmca_opal_common_ugni_so_version=0:0:0
-libmca_opal_common_verbs_so_version=0:0:0

configure.ac

@@ -158,7 +158,6 @@ AC_SUBST(libmca_opal_common_ofi_so_version)
 AC_SUBST(libmca_opal_common_cuda_so_version)
 AC_SUBST(libmca_opal_common_sm_so_version)
 AC_SUBST(libmca_opal_common_ugni_so_version)
-AC_SUBST(libmca_opal_common_verbs_so_version)
 AC_SUBST(libmca_orte_common_alps_so_version)
 AC_SUBST(libmca_ompi_common_ompio_so_version)
 AC_SUBST(libmca_ompi_common_monitoring_so_version)