FilterBar: remove handleKeyDown

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

app/soapbox/components/filter_bar.js

@@ -20,7 +20,6 @@ export default class FilterBar extends React.PureComponent {
   };
 
   componentDidMount() {
-    document.addEventListener('keydown', this.handleKeyDown, false);
     window.addEventListener('resize', this.handleResize, { passive: true });
 
     const { left, width } = this.getActiveTabIndicationSize();
@@ -28,7 +27,6 @@ export default class FilterBar extends React.PureComponent {
   }
 
   componentWillUnmount() {
-    document.removeEventListener('keydown', this.handleKeyDown, false);
     document.removeEventListener('resize', this.handleResize, false);
   }
 
@@ -52,27 +50,6 @@ export default class FilterBar extends React.PureComponent {
     this.focusedItem = c;
   }
 
-  handleKeyDown = e => {
-    const items = Array.from(this.node.getElementsByTagName('a'));
-    const index = items.indexOf(document.activeElement);
-    let element = null;
-
-    switch(e.key) {
-    case 'ArrowRight':
-      element = items[index+1] || items[0];
-      break;
-    case 'ArrowLeft':
-      element = items[index-1] || items[items.length-1];
-      break;
-    }
-
-    if (element) {
-      element.focus();
-      e.preventDefault();
-      e.stopPropagation();
-    }
-  }
-
   handleItemKeyPress = e => {
     if (e.key === 'Enter' || e.key === ' ') {
       this.handleClick(e);