cleanup payloadpage (#14613)

IPython/core/payloadpage.py

@@ -1,4 +1,3
-# encoding: utf-8
 """A payload based version of page."""
 
 # Copyright (c) IPython Development Team.
@@ -7,6 +6,9
 import warnings
 from IPython.core.getipython import get_ipython
 
+# see https://github.com/ipython/ipykernel/issues/1304
+# this should be moved to ipykernel and removed in the long run.
+
 
 def page(strng, start=0, screen_lines=0, pager_cmd=None):
     """Print a string, piping through a pager.
@@ -37,15 +39,3 def page(strng, start=0, screen_lines=0, pager_cmd=None):
         start=start,
         )
     shell.payload_manager.write_payload(payload)
-
-
-def install_payload_page():
-    """DEPRECATED, use show_in_pager hook
-
-    Install this version of page as IPython.core.page.page.
-    """
-    warnings.warn("""install_payload_page is deprecated.
-    Use `ip.set_hook('show_in_pager, page.as_hook(payloadpage.page))`
-    """)
-    from IPython.core import page as corepage
-    corepage.page = page