Revert "Specify bash for local-regionservers.sh and local-master-backup.sh"

This reverts commit ca8876a9f2.

bin/local-master-backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #/**
 # * Copyright 2007 The Apache Software Foundation
 # *

bin/local-regionservers.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #/**
 # * Copyright 2007 The Apache Software Foundation
 # *

src/main/asciidoc/_chapters/configuration.adoc

@@ -172,9 +172,6 @@ session required  pam_limits.so
 ----
 ====
 
-Linux Shell::
-  All of the shell scripts that come with HBase rely on the link:http://www.gnu.org/software/bash[GNU Bash] shell.
-
 Windows::
   Prior to HBase 0.96, testing for running HBase on Microsoft Windows was limited.
   Running a on Windows nodes is not recommended for production systems.