This looks unused

Hopefully I don't miss useful side-effects

Change-Id: Ie129e9de6110cdd679db5dfea0227115b5056367
Reviewed-on: https://gerrit.libreoffice.org/70378Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Mike Kaganski <mike.kaganski@collabora.com>

filter/source/config/cache/typedetection.cxx

@@ -1185,7 +1185,6 @@ bool TypeDetection::impl_validateAndSetFilterOnDescriptor(      utl::MediaDescri
         CacheItem aFilter = cache.getItem(FilterCache::E_FILTER, sFilter);
         OUString sType;
         aFilter[PROPNAME_TYPE] >>= sType;
-        CacheItem aType = cache.getItem(FilterCache::E_TYPE, sType);
 
         aLock.clear();
         // <- SAFE