python-scons: upgrade to v3.0.1; use pypi.bbclass

* Simplify recipe by using pypi.bbclass
* Drop patch for __future__ print_function
  - fixed upstream:
4c199d06e7

(From OE-Core rev: cf5c44ac611c2c2657e6fd3c1f723bcb20b812dd)

Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python-scons/SConscript-Support-python2-print-statements.patch

@@ -1,38 +0,0 @@
-From 885aabdb313685405737112dcb7d7774eee6d879 Mon Sep 17 00:00:00 2001
-From: Thomas Berg <merlin66b@gmail.com>
-Date: Thu, 19 Oct 2017 14:02:21 -0500
-Subject: [PATCH] SConscript: Support python2 print statements
-
-This fixes a regression introduced in scons-3.0.0, where
-SConscripts containing python 2 print statements would cause
-syntax errors even when executing scons with python 2.7.
-
-This ensures backward compatibility, allowing users to build
-legacy code with scons-3.0.0 without having to patch it.
-
-Taken from
-https://github.com/SConsProject/scons/commit/2e0de3c55f22b3eaa7767b69740b898f3d2f46bf
-
-Upstream-Status: Accepted
-
-Signed-off-by: Jose Lamego <jose.a.lamego@linux.intel.com>
----
- engine/SCons/Script/SConscript.py | 2 --
- 1 file changed, 2 deletions(-)
-
-diff --git a/engine/SCons/Script/SConscript.py b/engine/SCons/Script/SConscript.py
-index bc05540..332d1fa 100644
---- a/engine/SCons/Script/SConscript.py
-+++ b/engine/SCons/Script/SConscript.py
-@@ -5,8 +5,6 @@ files.
- 
- """
- 
--from __future__ import print_function
--
- #
- # Copyright (c) 2001 - 2017 The SCons Foundation
- #
--- 
-2.7.4
-

meta/recipes-devtools/python/python-scons_3.0.1.bb

@@ -2,20 +2,14 @@ SUMMARY = "Software Construction tool (make/autotools replacement)"
 SECTION = "devel/python"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=46ddf66004e5be5566367cb525a66fc6"
-SRCNAME = "scons"
 
-SRC_URI = "https://files.pythonhosted.org/packages/source/s/${SRCNAME}/${SRCNAME}-${PV}.tar.gz \
-           file://SConscript-Support-python2-print-statements.patch"
-
-SRC_URI[md5sum] = "7ca558edaaa1942fe38f3105ca2400fb"
-SRC_URI[sha256sum] = "aa5afb33c2bbd33c311e47e912412195739e9ffb2e933534a31f85fba8f3470e"
+SRC_URI[md5sum] = "b6a292e251b34b82c203b56cfa3968b3"
+SRC_URI[sha256sum] = "24475e38d39c19683bc88054524df018fe6949d70fbd4c69e298d39a0269f173"
 
 UPSTREAM_CHECK_URI = "http://scons.org/pages/download.html"
 UPSTREAM_CHECK_REGEX = "(?P<pver>\d+(\.\d+)+)\.tar"
 
-S = "${WORKDIR}/${SRCNAME}-${PV}"
-
-inherit setuptools
+inherit pypi setuptools
 
 RDEPENDS_${PN} = "\
   python-fcntl \