pmix3x: Remove --enable-install-libpmix option

This option is problematic, and has never worked in an Open MPI v4.0.x
release tarball.  Given that PMIx is now available elsewhere, it isn't
worth fixing this option.

See https://github.com/open-mpi/ompi/issues/6228 for more detail.

NOTE: This is a v4.0.x-specific commit because this option no longer
exists on master because we deleted the entire pmix3x component.
Hence, it's not possible to cherry-pick anything from master back to
the v4.0.x branch.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>
(cherry picked from commit 447b14061880e218371f9eb0cbe427b8358d45b8)

opal/mca/pmix/pmix3x/configure.m4

@@ -12,7 +12,7 @@
 #                         All rights reserved.
 # Copyright (c) 2011-2013 Los Alamos National Security, LLC.
 #                         All rights reserved.
-# Copyright (c) 2010-2017 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2010-2020 Cisco Systems, Inc.  All rights reserved
 # Copyright (c) 2013-2019 Intel, Inc.  All rights reserved.
 # Copyright (c) 2015-2016 Research Organization for Information Science
 #                         and Technology (RIST). All rights reserved.
@@ -37,10 +37,6 @@ AC_DEFUN([MCA_opal_pmix_pmix3x_CONFIG],[
     opal_pmix_pmix3x_save_LDFLAGS=$LDFLAGS
     opal_pmix_pmix3x_save_LIBS=$LIBS
 
-    AC_ARG_ENABLE([install-libpmix],
-                  [AC_HELP_STRING([--enable-install-libpmix],
-                                  [Enable a native PMIx library and headers in the OMPI install location (default: disabled)])])
-
     AC_ARG_ENABLE([pmix-timing],
                   [AC_HELP_STRING([--enable-pmix-timing],
                                   [Enable PMIx timing measurements (default: disabled)])])
@@ -54,16 +50,12 @@ AC_DEFUN([MCA_opal_pmix_pmix3x_CONFIG],[
     fi
 
     opal_pmix_pmix3x_args="$opal_pmix_pmix3x_timing_flag --without-tests-examples --disable-pmix-binaries --disable-pmix-backward-compatibility --disable-visibility --enable-embedded-libevent --with-libevent-header=\\\"opal/mca/event/$opal_event_base_include\\\" --enable-embedded-hwloc --with-hwloc-header=\\\"$opal_hwloc_base_include\\\""
+    opal_pmix_pmix3x_args="--with-pmix-symbol-rename=OPAL_MCA_PMIX3X_ --enable-embedded-mode $opal_pmix_pmix3x_args"
     AS_IF([test "$enable_debug" = "yes"],
           [opal_pmix_pmix3x_args="--enable-debug $opal_pmix_pmix3x_args"
            CFLAGS="$OPAL_CFLAGS_BEFORE_PICKY $OPAL_VISIBILITY_CFLAGS -g"],
           [opal_pmix_pmix3x_args="--disable-debug $opal_pmix_pmix3x_args"
            CFLAGS="$OPAL_CFLAGS_BEFORE_PICKY $OPAL_VISIBILITY_CFLAGS"])
-    AC_MSG_CHECKING([if want to install standalone libpmix])
-    AS_IF([test "$enable_install_libpmix" = "yes"],
-          [AC_MSG_RESULT([yes])],
-          [AC_MSG_RESULT([no])
-           opal_pmix_pmix3x_args="--with-pmix-symbol-rename=OPAL_MCA_PMIX3X_ --enable-embedded-mode $opal_pmix_pmix3x_args"])
     AS_IF([test "$with_devel_headers" = "yes"],
           [opal_pmix_pmix3x_args="--with-devel-headers  $opal_pmix_pmix3x_args"])
     CPPFLAGS="-I$OPAL_TOP_SRCDIR -I$OPAL_TOP_BUILDDIR -I$OPAL_TOP_SRCDIR/opal/include -I$OPAL_TOP_BUILDDIR/opal/include $CPPFLAGS"