runtime: delete mkasmh.sh
runtime: delete mkasmh.sh

This functionality moved into cmd/dist for Go 1.0.
Changes to this script have no effect.

R=golang-dev, r
CC=golang-dev
https://codereview.appspot.com/8020043

tv42/old-go,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,gnanderson/go,apparentlymart/golang,gnanderson/go,apparentlymart/golang,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang,apparentlymart/golang,tv42/old-go,dsriram/golang,apparentlymart/golang,apparentlymart/golang,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,dsriram/golang,apparentlymart/golang,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme