Trac #34324: Fix deprecated import of instancedoc

(from https://trac.sagemath.org/ticket/30787#comment:109)

URL: https://trac.sagemath.org/34324
Reported by: mkoeppe
Ticket author(s): Kwankyu Lee
Reviewer(s): Matthias Koeppe

Author: Release Manager

src/sage/docs/instancedoc.pyx src/sage/docs/instancedoc.py

@@ -116,5 +116,7 @@
 #                  https://www.gnu.org/licenses/
 #*****************************************************************************
 
-from sage.misc.lazy_import import lazy_import
-lazy_import('sage.misc.instancedoc', 'instancedoc', deprecation=33763)
+from sage.misc.superseded import deprecation
+deprecation(33763, 'This module is deprecated. Use "sage.misc.instancedoc" instead.')
+
+from sage.misc.instancedoc import instancedoc