sanitytest: stop passing python module path into sanity test

We want to move over to make sanitytest.py operate like a more normal
test script, which means making it self contained.

The setup.py already sets the PYTHONPATH thanks to changes introduced
in:

  commit eaded7bdad
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Tue Mar 18 11:11:48 2014 +0000

    Add support for running unit tests with nose

so passing the python module path into sanitytest.py is redundant.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

sanitytest.py

@@ -4,10 +4,6 @@ import sys
 import lxml
 import lxml.etree
 from typing import Dict, List, Set, Tuple  # noqa F401
-
-if len(sys.argv) >= 2:
-    # Munge import path to insert build location for libvirt mod
-    sys.path.insert(0, sys.argv[1])
 import libvirt
 
 

setup.py

@@ -310,7 +310,7 @@ class my_test(Command):
             os.environ["PYTHONPATH"] = self.build_platlib
 
         if "LIBVIRT_API_COVERAGE" in os.environ:
-            self.spawn([sys.executable, "sanitytest.py", self.build_platlib])
+            self.spawn([sys.executable, "sanitytest.py"])
         pytest = self.find_pytest_path()
         subprocess.check_call([pytest])