bpo-33556: Remove reference to thread module from docstring (GH-6963)

(cherry picked from commit 5634331)

Co-authored-by: Skip Montanaro <skip.montanaro@gmail.com>

Lib/threading.py

@@ -1093,7 +1093,7 @@ def name(self, name):
     def ident(self):
         """Thread identifier of this thread or None if it has not been started.
 
-        This is a nonzero integer. See the thread.get_ident() function. Thread
+        This is a nonzero integer. See the get_ident() function. Thread
         identifiers may be recycled when a thread exits and another thread is
         created. The identifier is available even after the thread has exited.