Extended set of environment modification commands. (#8996)

lib/spack/env/cc

@@ -202,18 +202,6 @@ if [[ -z $command ]]; then
     die "ERROR: Compiler '$SPACK_COMPILER_SPEC' does not support compiling $language programs."
 fi
 
-#
-# Set paths as defined in the 'environment' section of the compiler config
-#   names are stored in SPACK_ENV_TO_SET
-#   values are stored in SPACK_ENV_SET_<varname>
-#
-IFS=':' read -ra env_set_varnames <<< "$SPACK_ENV_TO_SET"
-for varname in "${env_set_varnames[@]}"; do
-    spack_varname="SPACK_ENV_SET_$varname"
-    export "$varname"="${!spack_varname}"
-    unset "$spack_varname"
-done
-
 #
 # Filter '.' and Spack environment directories out of PATH so that
 # this script doesn't just call itself