Removes the Page Information function from page backend module.
Also removes the Page Information table from within the Info>Pagetree.
Deprecates the function to show the info box.

The show_item function from within (i) icon already includes all infos.

Change-Id: I2f84fe6129f8c57c29610443b20064993ae0736c
Resolves: #37935
Releases: 6.0
Reviewed-on: http://review.typo3.org/13443
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert