Bug 31196: Remove 'default_value_for_mod_marc-' clear_from_cache calls

Bug 31196: Remove 'default_value_for_mod_marc-' clear_from_cache calls

We are seeing the following lines several times in the codebase
  $cache->clear_from_cache("default_value_for_mod_marc-");

But values are never set for this key.

Test plan:
Ask you, "Is the above correct?"
Use the correct 'git grep' and 'git log' and confirm the assertion.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>