gh-131591: Make --without-remote-debug work (GH-135925)

The feature is checked using `defined(Py_REMOTE_DEBUG)`; defining
the macro (even as `0`) enables it.

configure

@@ -29933,9 +29933,6 @@ printf "%s\n" "#define Py_REMOTE_DEBUG 1" >>confdefs.h
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 else
-
-printf "%s\n" "#define Py_REMOTE_DEBUG 0" >>confdefs.h
-
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 fi

configure.ac

@@ -7168,8 +7168,6 @@ if test "$with_remote_debug" = yes; then
     [Define if you want to enable remote debugging support.])
   AC_MSG_RESULT([yes])
 else
-  AC_DEFINE([Py_REMOTE_DEBUG], [0],
-    [Define if you want to enable remote debugging support.])
   AC_MSG_RESULT([no])
 fi