Revert "lp1895699: search results page lets user know that course materials filter...

Revert "lp1895699: search results page lets user know that course materials filter has been applied"

This reverts commit 828a6f871fbe04d85c4c7132c37340b7f1f19811.

This led to a failure in live_t/35-multiclass-search.t, and sometimes led to cases where searching
with the course materials filter would time out or return an error.

The issue lies with the dynamic_filter_compile subroutine in QueryParser.pm.  It makes an
assumption that any filter with an entry in config.record_attr_definition will also have
entries in config.coded_value_map.  This db migration had no such coded_value_map entries,
so it added a function call to the query_int_wrapper function, which works in some environments
and doesn't in others.  We don't want that!

Signed-off-by: Jane Sandberg <js7389@princeton.edu>
Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>