Use pure python3

There is no sense in complicating things, borrow idea to use python3 only from alzim2/chromium-browser-stable

chromium-browser-stable.spec

@@ -121,9 +121,6 @@ Patch639:	wayland-strndup.patch
 # Fix building with current glib2.0
 # Hunks from https://build.opensuse.org/package/view_file/openSUSE:Factory/chromium/chromium-gcc11.patch
 Patch643:	glib2.0.patch
-# Fix mess of python2 and python3
-# https://github.com/saiarcot895/chromium-ubuntu-build/blob/master/debian/patches/rename-python-to-python2.patch
-Patch646:	rename-python-to-python2.patch
 Patch647:	ALT-allow-to-override-clang-through-env-variables.patch
 # XXX This patch is not enough to fully fix debuginfo and debugsource subpackages
 Patch648:	fix-debugsource.patch

rename-python-to-python2.patch

@@ -1,86 +0,0 @@
-Index: dev/tools/gn/bootstrap/bootstrap.py
-===================================================================
---- dev.orig/tools/gn/bootstrap/bootstrap.py
-+++ dev/tools/gn/bootstrap/bootstrap.py
-@@ -1,4 +1,4 @@
--#!/usr/bin/env python
-+#!/usr/bin/env python3
- # Copyright 2014 The Chromium Authors. All rights reserved.
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
-Index: dev/tools/generate_stubs/generate_stubs.py
-===================================================================
---- dev.orig/tools/generate_stubs/generate_stubs.py
-+++ dev/tools/generate_stubs/generate_stubs.py
-@@ -1,4 +1,4 @@
--#!/usr/bin/env python
-+#!/usr/bin/env python3
- # Copyright (c) 2012 The Chromium Authors. All rights reserved.
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
-Index: dev/tools/gn/build/gen.py
-===================================================================
---- dev.orig/tools/gn/build/gen.py
-+++ dev/tools/gn/build/gen.py
-@@ -1,4 +1,4 @@
--#!/usr/bin/env python
-+#!/usr/bin/env python3
- # Copyright 2014 The Chromium Authors. All rights reserved.
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
-Index: dev/tools/gn/src/gn/setup.cc
-===================================================================
---- dev.orig/tools/gn/src/gn/setup.cc
-+++ dev/tools/gn/src/gn/setup.cc
-@@ -795,7 +795,7 @@ bool Setup::FillPythonPath(const base::C
-     }
-     build_settings_.set_python_path(python_path);
- #else
--    build_settings_.set_python_path(base::FilePath("python"));
-+    build_settings_.set_python_path(base::FilePath("python2"));
- #endif
-   }
-   return true;
-Index: dev/third_party/catapult/common/py_vulcanize/py_vulcanize/generate.py
-===================================================================
---- dev.orig/third_party/catapult/common/py_vulcanize/py_vulcanize/generate.py
-+++ dev/third_party/catapult/common/py_vulcanize/py_vulcanize/generate.py
-@@ -83,7 +83,7 @@ def _MinifyJS(input_js):
- 
-   with tempfile.NamedTemporaryFile() as _:
-     args = [
--        sys.executable,
-+        'python3',
-         rjsmin_path
-     ]
-     p = subprocess.Popen(args,
-Index: dev/ui/gfx/x/gen_xproto.py
-===================================================================
---- dev.orig/ui/gfx/x/gen_xproto.py
-+++ dev/ui/gfx/x/gen_xproto.py
-@@ -1087,7 +1087,7 @@ class GenXproto(FileWriter):
- 
-         self.resolve_element(t.elt, fields)
- 
--        for field in fields.values():
-+        for field in list(fields.values()):
-             if field.field_name == 'sequence':
-                 field.visible = True
-             field.parent = (t, name)
-@@ -1629,8 +1630,14 @@ def main():
-     args = parser.parse_args()
- 
-     sys.path.insert(1, args.xcbproto_dir)
--    import xcbgen.xtypes
--    import xcbgen.state
-+    try:
-+        import xcbgen.xtypes
-+        import xcbgen.state
-+    except:
-+        if sys.version_info < (3, 0):
-+            import subprocess
-+            subprocess.check_call(["python3"] + sys.argv)
-+            return 0
- 
-     all_types = {}
-     proto_src_dir = os.path.join(args.xcbproto_dir, 'src')