Remove unused third_party/talloc

third_party/talloc/script/abi_checks_gcc.sh

-#!/bin/bash
-
-make clean
-
-mkdir abi
-ABI_CHECKS="-aux-info abi/\$@.X"
-make ABI_CHECK="$ABI_CHECKS" CC="/usr/bin/gcc"
-
-for i in abi/*.X; do cat $i | grep 'talloc\.h'; done | sort | uniq | awk -F "extern " '{ print $2 }' | sort > abi/signatures
-
-cat > abi/exports << EOF
-{
-    global:
-EOF
-cat abi/signatures | awk -F '(' '{ print $1 }' | awk -F ' ' '{ print "           "$NF";" }' | tr -d '*' | sort >> abi/exports
-# need to manually add talloc free for backward ABI compat
-echo '           talloc_free;' >> abi/exports
-cat >> abi/exports << EOF
-
-    local: *;
-};
-EOF
-
-rm -fr abi/*.X
-
-diff -u talloc.signatures abi/signatures
-if [ "$?" != "0" ]; then
-    echo "WARNING: Possible ABI Change!!"
-fi
-
-diff -u talloc.exports abi/exports
-if [ "$?" != "0" ]; then
-    echo "WARNING: Export file may be outdated!!"
-fi