Bug 21377: Remove erroneous "html" filter use

Bug 21377: Remove erroneous "html" filter use

The "html" filter that is being applied to these variable declarations
is inappropriate and has been removed.
I've also simplified things by removing two of the extraneous variable
declarations.

To test:

- Before applying the patch, on master, view the "Manage request" page
for an ILL request
- TEST: Observe that, apart from the "Edit request" button, the various
available action buttons do not display correctly
- Apply the patch
- TEST: Refresh the page and observe that the buttons now display
correctly

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>