tools: Drop check-abis.sh script

It hasn’t been used for years, and isn’t really needed since we changed
to explicitly exporting symbols (using `GLIB_AVAILABLE_IN_*`) rather than
implicitly exporting them unless they were hidden.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

tools/check-abis.sh

@@ -1,23 +0,0 @@
-#!/bin/sh -e
-
-list_leaked_symbols () {
-	nm -D "$1" | grep ' T ' | cut -f 3 -d ' ' | grep -E -v "$2"
-}
-
-check_symbols () {
-	if [ "$(list_leaked_symbols "$1" "$2" | wc -l)" -ne 0 ]; then
-		echo File "$1" possibly leaking symbols:
-		list_leaked_symbols "$1" "$2"
-		exit 1
-	fi
-}
-
-allowed="^_init$|^_fini$|^_ftext$|^g_"
-allowed_in_libglib="${allowed}|^glib__private__$|^glib_gettext$|^glib_pgettext$|^glib_check_version$"
-allowed_in_libgthread='^_init$|^_fini$|^_ftext$|^g_thread_init$|^g_thread_init_with_errorcheck_mutexes$'
-
-check_symbols glib/.libs/libglib-2.0.so "$allowed_in_libglib"
-check_symbols gthread/.libs/libgthread-2.0.so "$allowed_in_libgthread"
-for file in gmodule/.libs/libgmodule-2.0.so gobject/.libs/libgobject-2.0.so gio/.libs/libgio-2.0.so; do
-	check_symbols "$file" "$allowed"
-done