WebSearch: remove accent-search warning in guide
WebSearch: remove accent-search warning in guide

* Remove obsolete accent-search warning in the Search Guide.

* Cherry-picked from 0bcd0c042c1004c09f1b12cc0a771fadcdb14eca.

tiborsimko/invenio-search,inveniosoftware/invenio-records,tiborsimko/invenio-records,inveniosoftware/invenio-search,inveniosoftware/invenio-search,tiborsimko/invenio-records,inveniosoftware/invenio-records,tiborsimko/invenio-search