BUG - Remove cruft symbols (#1998)

As reported in
#1997 - this PR
removes some cruft leftover from #1921

This should be merged ideally before cutting the `0.16.0` release.

Author: trallard

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/search-button.html

@@ -3,4 +3,3 @@
 <button class="btn btn-sm pst-navbar-icon search-button search-button__button pst-js-only" title="{{ _('Search') }}" aria-label="{{ _('Search') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
     <i class="fa-solid fa-magnifying-glass fa-lg"></i>
 </button>
-`);