Remove python3 specific runme3.py test files

This file can be run using Python 2, the test is just ignored

Examples/test-suite/python/python_abstractbase_runme.py

@@ -0,0 +1,35 @@
+import sys
+
+# collections.abc requires Python 3.3+
+if sys.version_info[0:2] < (3, 3):
+    exit(0)
+
+from python_abstractbase import *
+import collections.abc
+
+# This is expected to fail with -builtin option
+# Builtin types can't inherit from pure-python abstract bases
+if is_python_builtin():
+    exit(0)
+
+# Python abc is only turned on when -py3 option is passed to SWIG
+if not is_swig_py3:
+    exit(0)
+
+def check_issubclass(derived, base):
+    if not issubclass(derived, base):
+        raise RuntimeError("{} is not a subclass of {}".format(derived, base))
+
+check_issubclass(Mapii, collections.abc.MutableMapping)
+check_issubclass(Multimapii, collections.abc.MutableMapping)
+check_issubclass(IntSet, collections.abc.MutableSet)
+check_issubclass(IntMultiset, collections.abc.MutableSet)
+check_issubclass(IntVector, collections.abc.MutableSequence)
+check_issubclass(IntList, collections.abc.MutableSequence)
+
+mapii = Mapii()
+multimapii = Multimapii()
+intset = IntSet()
+intmultiset = IntMultiset()
+intvector = IntVector()
+intlist = IntList()