Removed set_env.sh from nanosoc tech

set_env.sh

-#-----------------------------------------------------------------------------
-# SoC Labs Environment Setup Script
-# A joint work commissioned on behalf of SoC Labs, under Arm Academic Access license.
-#
-# Contributors
-#
-# David Mapstone (d.a.mapstone@soton.ac.uk)
-#
-# Copyright  2023, SoC Labs (www.soclabs.org)
-#-----------------------------------------------------------------------------
-#!/bin/bash
-
-# Set SOCLABS_NANOSOC_TECH_DIR environment variable
-if [ -z $SOCLABS_NANOSOC_TECH_DIR ]; then
-    # If $SOCLABS_NANOSOC_TECH_DIRN_ROOT hasn't been set yet
-    export SOCLABS_NANOSOC_TECH_DIR=`git rev-parse --show-toplevel`
-fi
\ No newline at end of file