script/validate-gofmt: rm

Add gofmt to golangci-lint configuration, and remove the script
which ran gofmt.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

script/validate-gofmt

@@ -1,30 +0,0 @@
-#!/bin/bash
-
-source "$(dirname "$BASH_SOURCE")/.validate"
-
-IFS=$'\n'
-files=($(validate_diff --diff-filter=ACMR --name-only -- '*.go' | grep -v '^vendor/' || true))
-unset IFS
-
-badFiles=()
-for f in "${files[@]}"; do
-	# we use "git show" here to validate that what's committed is formatted
-	if [ "$(git show "$VALIDATE_HEAD:$f" | gofmt -s -l)" ]; 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
-	false
-fi