bpo-30270: Remove sqlite3.Cache display method

Misc/NEWS

@@ -10,6 +10,8 @@ What's New in Python 3.7.0 alpha 1?
 Core and Builtins
 -----------------
 
+- bpo-30270: Remove sqlite3.Cache disply method.  Patch by Aviv Palivoda.
+
 - bpo-12414: sys.getsizeof() on a code object now returns the sizes
   which includes the code struct and sizes of objects which it references.
   Patch by Dong-hee Na.

Modules/_sqlite/cache.c

@@ -211,47 +211,9 @@ PyObject* pysqlite_cache_get(pysqlite_Cache* self, PyObject* args)
     return node->data;
 }
 
-PyObject* pysqlite_cache_display(pysqlite_Cache* self, PyObject* args)
-{
-    pysqlite_Node* ptr;
-    PyObject* prevkey;
-    PyObject* nextkey;
-    PyObject* display_str;
-
-    ptr = self->first;
-
-    while (ptr) {
-        if (ptr->prev) {
-            prevkey = ptr->prev->key;
-        } else {
-            prevkey = Py_None;
-        }
-
-        if (ptr->next) {
-            nextkey = ptr->next->key;
-        } else {
-            nextkey = Py_None;
-        }
-
-        display_str = PyUnicode_FromFormat("%S <- %S -> %S\n",
-                                           prevkey, ptr->key, nextkey);
-        if (!display_str) {
-            return NULL;
-        }
-        PyObject_Print(display_str, stdout, Py_PRINT_RAW);
-        Py_DECREF(display_str);
-
-        ptr = ptr->next;
-    }
-
-    Py_RETURN_NONE;
-}
-
 static PyMethodDef cache_methods[] = {
     {"get", (PyCFunction)pysqlite_cache_get, METH_O,
         PyDoc_STR("Gets an entry from the cache or calls the factory function to produce one.")},
-    {"display", (PyCFunction)pysqlite_cache_display, METH_NOARGS,
-        PyDoc_STR("For debugging only.")},
     {NULL, NULL}
 };