Remove unused files

Author: tangzz98

SConscript

@@ -1,5 +1,4 @@
 import os
-import shutil
 from building import *
 
 cwd = GetCurrentDir()
@@ -14,10 +13,4 @@ for d in list:
     if os.path.isfile(os.path.join(path, 'SConscript')):
         objs = objs + SConscript(os.path.join(d, 'SConscript'))
 
-#delate non-used files
-try:
-    shutil.rmtree(os.path.join(cwd,'legacy'))
-except:
-    pass
-
 Return('objs')