Remove cypclass unit tests with recursive locks

Recursive lock acquisition causes segmentation faults.

tests/run/cypclass_lock.pyx

-# mode: run
-# tag: cpp, cpp11, pthread
-# cython: experimental_cpp_class_def=True, language_level=2
-
-cdef cypclass A checklock:
-    int a
-    __init__(self):
-        self.a = 0
-    int getter(const self):
-        return self.a
-    void setter(self, int a):
-        self.a = a
-
-def test_basic_locking():
-    """
-    >>> test_basic_locking()
-    0
-    """
-    obj = A()
-    with rlocked obj:
-        print obj.getter()
-
-cdef argument_recursivity(A obj, int arg):
-    if arg > 0:
-        obj.setter(obj.getter() + 1)
-        argument_recursivity(obj, arg - 1)
-
-def test_argument_recursivity(n):
-    """
-    >>> test_argument_recursivity(42)
-    42
-    """
-    obj = A()
-    with wlocked obj:
-        argument_recursivity(obj, n)
-        print obj.a
-
-cdef cypclass Container:
-    A object
-    __init__(self):
-        self.object = A()
-
-def test_lock_traversal(n):
-    """
-    >>> test_lock_traversal(42)
-    42
-    """
-    container = Container()
-    with rlocked container:
-        contained = container.object
-        with wlocked contained:
-            argument_recursivity(contained, n)
-            print contained.getter()