This has always been dead code because it used wrong constants
FRMTYPE_HEADER|FRMTYPE_FOOTER which is actually Page|Column and
SwPageFrame and SwColumnFrame are not direct children of SwPageFrame.

Then commit 901e5c3a fixed the
constants but somehow the early formatting of header/footer results
in wrong expansion of variable text fields, so just remove this code.

Change-Id: I0af13168970f26355a1b247e071235166d08b7a4