Remove references to "GO111MODULE"

hack/lint-dependencies.sh

@@ -87,7 +87,7 @@ unused=$(comm -23 \
 if [[ -n "${unused}" ]]; then
   echo ""
   echo "Use the given commands to remove pinned module versions that aren't actually used:"
-  echo "${unused}" | xargs -L 1 echo 'GO111MODULE=on go mod edit -dropreplace'
+  echo "${unused}" | xargs -L 1 echo 'go mod edit -dropreplace'
 fi
 
 if [[ -n "${unused}${outdated}${noncanonical}" ]]; then