Revert "bin:gr: add helper to for r in `git remote`; do ..."

pointeless

This reverts commit 9de2b56fa6.

files/bin/gr

@@ -1,15 +0,0 @@
-#!/bin/sh
-
-if [ $# -eq 0 ]; then
-	cat >&2 <<-EOT
-	Usage: $0 <args...>
-
-	runs <args...> over every remote
-	EOT
-	exit 2
-fi
-
-for r in $(git remote); do
-	echo "== $r"
-	git remote "$r" "$@"
-done