Don't use hack/make.sh for validate-gofmt

hack/make.sh now does not make a difference, so simplify.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

hack/validate-gofmt.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+IFS=$'\n'
+files=( $(find . -name '*.go' | grep -v '^./vendor/' | sort || true) )
+unset IFS
+
+badFiles=()
+for f in "${files[@]}"; do
+	if [ "$(gofmt -s -l < $f)" ]; then
+		badFiles+=( "$f" )
+	fi
+done
+
+if [ ${#badFiles[@]} -eq 0 ]; then
+	echo 'Congratulations!  All Go source files are properly formatted.'
+else
+	{
+		echo "These files are not properly gofmt'd:"
+		for f in "${badFiles[@]}"; do
+			echo " - $f"
+		done
+		echo
+		echo 'Please reformat the above files using "gofmt -s -w" and commit the result.'
+		echo
+	} >&2
+	exit 1
+fi