Remove setup_xblock.sh script (no longer necessary).

utils/setup_xblock.sh

-#!/bin/bash
-
-if [ ! -d 'apps' ] || [ ! -f 'manage.py' ]; then
-    echo "Sorry; this must be run from the top-level of the tim working tree"
-    exit 1;
-fi
-echo "Ok, installing XBlocks..."
-
-git clone https://github.com/edx/XBlock.git
-
-MODULES=`find XBlock/ -iname 'setup.py' | grep -v prototype`
-
-# Installing XBlock base package is a prerequisite for the rest working
-cd XBlock
-pip install -e .
-cd ..
-
-# This will install XBlock base twice, but that's ok
-for dir in $MODULES; do 
-    mod_work_dir=`dirname $dir`
-    cd $mod_work_dir
-    pip install -e .
-    if [ ! $? ]; then        # If anything goes wrong
-        exit 187             # then die violently
-    fi
-    cd -
-done
-
-cd apps/openassessment_compose
-pip install -e .
-cd -
-
-echo "You can run the workbench by saying:"
-echo "cd XBlock; python manage.py runserver"