Bug 11231: remove reference to ambiguous notes column from two hold request reports

Bug 11231: remove reference to ambiguous notes column from two hold request reports

The 'notes' column has been removed from the pending holds and hold
ratios reports as they were not displaying in the first place.

1.apply patch
2.verify that both reports work

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit cc34a816a10ca76004e079032f1a46aec1ccb1c4)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>