Remove scons-related files

Externals/zlib/SConscript

@@ -1,31 +0,0 @@
-# -*- python -*-
-
-Import('env')
-import sys
-
-if env.has_key('shared_zlib') and env['shared_zlib']:
-	Return()
-
-if sys.platform == 'darwin':
-	Return()
-
-files = [
-	'adler32.c',
-	'compress.c',
-	'crc32.c',
-	'deflate.c',
-	'gzclose.c',
-	'gzlib.c',
-	'gzread.c',
-	'gzwrite.c',
-	'infback.c',
-	'inffast.c',
-	'inflate.c',
-	'inftrees.c',
-	'trees.c',
-	'uncompr.c',
-	'zutil.c',
-	]
-
-env['CPPPATH'] += ['#Externals/zlib']
-env['LIBS'] += env.StaticLibrary('z', files)