fix: remove duplicate EN/AR language toggle from filter bars

The header already has a language switcher; the one in the filter
bar was redundant on both Dashboard and Comparison pages.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/Comparison.tsx

@@ -640,10 +640,6 @@ export default function PeriodSelectorDemo({ data, seasons, includeVAT, allowedM
         <AltMultiSelect value={selChannels}  options={channels}  onChange={setSelChannels}  allLabel={L.allChannels}  countLabel={L.countChannels}  clearLabel={L.clearSel} />
         <AltMultiSelect value={selMuseums}   options={museums}   onChange={setSelMuseums}   allLabel={L.allMuseums}   countLabel={L.countMuseums}   clearLabel={L.clearSel} />
         {hasFilters && <button type="button" className="alt-filter-reset" onClick={() => { setSelDistricts([]); setSelChannels([]); setSelMuseums([]); }}>{L.reset}</button>}
-        <div className="alt-vat-toggle" style={{ marginInlineStart: 'auto' }}>
-          <button type="button" className={`alt-vat-opt${activeLang==='en'?' alt-vat-opt--on':''}`} onClick={() => setLanguage('en')}>EN</button>
-          <button type="button" className={`alt-vat-opt${activeLang==='ar'?' alt-vat-opt--on':''}`} onClick={() => setLanguage('ar')}>AR</button>
-        </div>
       </div>
 
       <div className="alt-section-heading"><h2>{L.keyMetrics}</h2></div>