Revert "Bug 12478: Display facet terms ordered by number of occurrences"

Revert "Bug 12478: Display facet terms ordered by number of occurrences"

This reverts commit cd4905c2969b067476881016d0b03271f0bcc7c8.

This commit caused an error in C4::Search::GetFacets when running in
zebra mode.

Conflicts:
	Koha/SearchEngine/Elasticsearch/Search.pm

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jesse Weaver <jweaver@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>