Delete unused release hook script

Closes #12378

release-hook-post-linux.sh

@@ -1,9 +0,0 @@
-#!/bin/bash
-
-# Se https://github.com/gohugoio/hugo/issues/8955
-objdump -T dist/hugo_extended_linux_linux_amd64/hugo | grep -E -q 'GLIBC_2.2[0-9]'
-RESULT=$?
-if [ $RESULT -eq 0 ]; then
-    echo "Found  GLIBC_2.2x in Linux binary, this will not work in older Vercel/Netlify images.";
-    exit -1;
-fi