Nuke setup.py: It doesn't do anything special

It's just confusing for people to see that in the build root, and we
do not even mention this file in the README.

setup.py

@@ -1,82 +0,0 @@
-#!/usr/bin/env python3
-"""Script for generating the Makefiles."""
-
-import argparse
-import os
-import sys
-import shutil
-import subprocess
-
-from scripts.common import get_meson
-from scripts.common import accept_command
-
-
-PROJECTNAME = "GStreamer build"
-
-ROOTDIR = os.path.abspath(os.path.dirname(__file__))
-
-
-class GstBuildConfigurer:
-
-    def __init__(self, options, args):
-        self.options = options
-        self.args = args
-
-    def get_configs(self):
-        if self.options.werror:
-            return ['--werror']
-        return []
-
-    def configure_meson(self):
-        if not self.options.reconfigure:
-            if os.path.exists(ROOTDIR + "/build/build.ninja"):
-                print("Not reconfiguring")
-                return True
-
-        try:
-            meson = get_meson()
-        except RuntimeError:
-            print("Install mesonbuild to build %s: http://mesonbuild.com/\n"
-                  "You can simply install it with:\n"
-                  "    $ sudo pip3 install meson" % PROJECTNAME)
-            return False
-
-        ninja = accept_command(["ninja", "ninja-build"])
-        if not ninja:
-            print("Install ninja-build to build %s: https://ninja-build.org/"
-                  % PROJECTNAME)
-            return False
-
-        build_dir = os.path.join(ROOTDIR, "build")
-        shutil.rmtree(build_dir, True)
-        os.mkdir(build_dir)
-
-        try:
-            subprocess.check_call(meson + ["../"] + self.args + self.get_configs(),
-                                  cwd=build_dir)
-            print("\nYou can now build GStreamer and its various subprojects running:\n"
-                  " $ {} -C {!r}".format(os.path.basename(ninja), build_dir))
-        except subprocess.CalledProcessError:
-            return False
-
-        return True
-
-    def setup(self):
-        return self.configure_meson()
-
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description='Process some integers.')
-    parser.add_argument("--reconfigure", action='store_true',
-                        default=False, help='Force a full reconfiguration'
-                        ' meaning the build/ folder is removed.'
-                        ' You can also use `ninja reconfigure` to just'
-                        ' make sure meson is rerun but the build folder'
-                        ' is kept.')
-    parser.add_argument("--werror", action='store_true',
-                        default=False, help="Do not error out on warnings")
-
-    options, args = parser.parse_known_args()
-    configurer = GstBuildConfigurer(options, args)
-    exit(not configurer.setup())