remove unused imports

Cython/Compiler/Main.py

@@ -2,7 +2,7 @@
 #   Cython Top Level
 #
 
-import os, sys, re, codecs
+import os, sys, re
 if sys.version_info[:2] < (2, 3):
     sys.stderr.write("Sorry, Cython requires Python 2.3 or later\n")
     sys.exit(1)

Cython/Compiler/Scanning.py

@@ -2,12 +2,9 @@
 #   Cython Scanner
 #
 
+import sys
 import os
 import platform
-import stat
-import sys
-import codecs
-from time import time
 
 import cython
 cython.declare(EncodedString=object, string_prefixes=object, raw_prefixes=object, IDENT=object,