No need to override mkshrc as it no longer exports PS1

busybox sh works fine with the one in android_external_mksh

Change-Id: I09ae2d16837053ea0be50d3320eccf47057e25c1

config/common.mk

@@ -129,10 +129,6 @@ PRODUCT_COPY_FILES += \
 PRODUCT_COPY_FILES += \
     vendor/cm/config/permissions/com.cyanogenmod.android.xml:system/etc/permissions/com.cyanogenmod.android.xml
 
-# Don't export PS1 in /system/etc/mkshrc.
-PRODUCT_COPY_FILES += \
-    vendor/cm/prebuilt/common/etc/mkshrc:system/etc/mkshrc
-
 # T-Mobile theme engine
 include vendor/cm/config/themes_common.mk
 

prebuilt/common/etc/mkshrc

@@ -1,29 +0,0 @@
-# Copyright (c) 2010
-#	Thorsten Glaser <t.glaser@tarent.de>
-# This file is provided under the same terms as mksh.
-#-
-# Minimal /system/etc/mkshrc for Android
-
-: ${TERM:=vt100} ${HOME:=/data} ${MKSH:=/system/bin/sh} ${HOSTNAME:=android}
-: ${SHELL:=$MKSH} ${USER:=$(typeset x=$(id); x=${x#*\(}; print -r -- ${x%%\)*})}
-if (( USER_ID )); then PS1='$'; else PS1='#'; fi
-function precmd {
-	typeset e=$?
-
-	(( e )) && print -n "$e|"
-}
-PS1='$(precmd)$USER@$HOSTNAME:${PWD:-?} '"$PS1 "
-export HOME HOSTNAME MKSH SHELL TERM USER
-alias l='ls'
-alias la='l -a'
-alias ll='l -l'
-alias lo='l -a -l'
-
-for p in ~/.bin; do
-	[[ -d $p/. ]] || continue
-	[[ :$PATH: = *:$p:* ]] || PATH=$p:$PATH
-done
-
-unset p
-
-: place customisations above this line