configure: follow-up fix for krb5-config

commit 5b668606 was incomplete so here's a follow-up fix

Reported-by: Dagobert Michelsen
Bug: https://github.com/bagder/curl/commit/5b668606527613179d0349f21b4ab0df2971e3d2#commitcomment-10473445

configure.ac

@@ -1194,8 +1194,6 @@ if test x"$want_gss" = xyes; then
   if test -z "$GSSAPI_INCS"; then
      if test -n "$host_alias" -a -f "$GSSAPI_ROOT/bin/$host_alias-krb5-config"; then
         GSSAPI_INCS=`$GSSAPI_ROOT/bin/$host_alias-krb5-config --cflags gssapi`
-     elif test -f "$GSSAPI_ROOT/bin/krb5-config"; then
-        GSSAPI_INCS=`$GSSAPI_ROOT/bin/krb5-config --cflags gssapi`
      elif test -f "$KRB5CONFIG"; then
         GSSAPI_INCS=`$KRB5CONFIG --cflags gssapi`
      elif test "$GSSAPI_ROOT" != "yes"; then