Removed old full clean code from bb config

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>

dev/buildbot/master/master.cfg

@@ -54,35 +54,6 @@ from buildbot.steps.slave import MakeDirectory, RemoveDirectory, CopyDirectory
 from buildbot.steps.transfer import DirectoryUpload, FileDownload
 from buildbot.process import properties
 
-"""
-from http://ss64.com/nt/del.html
-deltree.cmd script, save it somewhere on the system PATH on windows
-:: DelTree.cmd
-:: Remove all files and subfolders but NOT the root folder
-:: From tip 617 at JsiFAQ.com
-@echo off
-if "%1"=="" goto:eof
-pushd %1
-del /q *.*
-for /f "Tokens=*" %%G in ('dir /B') do rd /s /q "%%G"
-popd
-"""
-
-@properties.renderer
-def cleanCommand(props):
-
-    fullclean = props.getProperty('fullclean', default = False)
-    is_windows = props.getProperty('slavename').find('windows') >= 0
-
-    if fullclean:
-        if is_windows:
-            command = ' '.join(['deltree','.','&&','echo','fully cleaned'])
-        else:
-            command = ' '.join(['rm','-rfv','*','&&','echo','fully cleaned'])
-    else:
-        command = ['echo','no clean requested;', 'fullclean:', props.getProperty('fullclean')]
-    return command
-
 # A custom platform and Python identifiers
 platformID = {
     "windows" : 1,