Combine post-deploy and post-rollback

lib/mrsk/cli/templates/sample_hooks/post-rollback.sample

@@ -1,18 +0,0 @@
-#!/bin/sh
-
-# A sample post-rollback hook
-#
-# Checks:
-# 1. We have a clean checkout
-# 2. A remote is configured
-# 3. The branch has been pushed to the remote
-# 4. The version we are deploying matches the remote
-#
-# These environment variables are available:
-# MRSK_RECORDED_AT
-# MRSK_PERFORMER
-# MRSK_VERSION
-# MRSK_DESTINATION (if set)
-# MRSK_RUNTIME
-
-echo "$MRSK_PERFORMER rolled back to $MRSK_VERSION on $MRSK_DESTINATION in $MRSK_RUNTIME seconds"