newlib: phoenix: drop missing machine subdirs

These were never added to the tree, and as we transition from autoconf
to automake, it really wants the latter subdirs to always exist.  These
don't, so delete the logic.

newlib/libc/sys/phoenix/machine/configure

@@ -727,10 +727,7 @@ CPPFLAGS
 CPP
 CCAS
 CCASFLAGS'
-ac_subdirs_all='arm
-esirisc
-i386
-powerpc'
+ac_subdirs_all='arm'
 
 # Initialize some variables set by options.
 ac_init_help=
@@ -4269,12 +4266,6 @@ if test -n "${machine_dir}"; then
 	arm)
 
 subdirs="$subdirs arm"
- ;;
-	esirisc) subdirs="$subdirs esirisc"
- ;;
-	i386) subdirs="$subdirs i386"
- ;;
-	powerpc) subdirs="$subdirs powerpc"
  ;;
   esac;
 fi

newlib/libc/sys/phoenix/machine/configure.ac

@@ -12,9 +12,6 @@ NEWLIB_CONFIGURE(../../../..)
 if test -n "${machine_dir}"; then
   case ${machine_dir} in
 	arm) AC_CONFIG_SUBDIRS(arm) ;;
-	esirisc) AC_CONFIG_SUBDIRS(esirisc) ;;
-	i386) AC_CONFIG_SUBDIRS(i386) ;;
-	powerpc) AC_CONFIG_SUBDIRS(powerpc) ;;
   esac;
 fi