Fix remaining warnings on PyPy and CPython 3.10-dev

Author: YannickJadoul

tests/test_builtin_casters.py

@@ -335,7 +335,7 @@ def require_implicit(v):
 
     # The implicit conversion from np.float32 is undesirable but currently accepted.
     # TODO: Avoid DeprecationWarning in `PyLong_AsLong` (and similar)
-    if env.PY >= (3, 8):
+    if (3, 8) <= env.PY < (3, 10):
         with pytest.deprecated_call():
             assert convert(np.float32(3.14159)) == 3
     else:

tests/test_class.cpp

@@ -434,8 +434,7 @@ TEST_SUBMODULE(class_, m) {
     struct SamePointer {};
     static SamePointer samePointer;
     py::class_<SamePointer, std::unique_ptr<SamePointer, py::nodelete>>(m, "SamePointer")
-        .def(py::init([]() { return &samePointer; }))
-        .def("__del__", [](SamePointer&) { py::print("__del__ called"); });
+        .def(py::init([]() { return &samePointer; }));
 
     struct Empty {};
     py::class_<Empty>(m, "Empty")