Remove now superfluous libratbag.sym

We don't ship a library anymore, so dealing with library symbols isn't
necessary.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

test/symbols-leak-test

@@ -1,22 +0,0 @@
-#!/bin/bash
-
-### simple check for exported symbols
-
-TOP_SRCDIR="$1"
-
-if [ -z "$TOP_SRCDIR" ]; then
-	echo "usage: $0 path/to/top_srcdir"
-	exit 1
-fi
-
-# make bash exit if any command will exit with non-0 return value
-set -e
-
-# make sure the paths are alright
-diff -a -u \
-	<(cat "$TOP_SRCDIR"/src/libratbag.sym | \
-		grep '^\s\+ratbag_.*' | \
-		sed -e 's/^\s\+\(.*\);/\1/' |  sort) \
-	<(cat "$TOP_SRCDIR"/src/*.c | \
-		grep LIBRATBAG_EXPORT -A 1 | grep '^ratbag_.*' | \
-		sed -e 's/(.*//' | sort)