TypeaheadSearch: Remove active class

This class is no longer needed within the component, and its
only use was in an application (Vector search app) that has
already been updated in I738c0f24dcd to handle the active
state within the application code.

Bug: T316893
Change-Id: I81ac37b5f789f44afdf660d82fa1748699eb6726

packages/codex/src/components/typeahead-search/TypeaheadSearch.test.ts

@@ -91,7 +91,6 @@ describe( 'TypeaheadSearch initial state', () => {
 
 		const input = wrapper.find( '.cdx-text-input__input' );
 		await input.trigger( 'focus' );
-		expect( wrapper.find( '.cdx-typeahead-search' ).classes() ).toContain( 'cdx-typeahead-search--active' );
 		expect( wrapper.find( '.cdx-typeahead-search' ).classes() ).not.toContain( 'cdx-typeahead-search--expanded' );
 		expect( wrapper.vm.expanded ).toBeFalsy();
 	} );
@@ -112,7 +111,6 @@ describe( 'TypeaheadSearch initial state', () => {
 		expect( wrapper.vm.expanded ).toStrictEqual( true );
 
 		await input.trigger( 'blur' );
-		expect( wrapper.find( '.cdx-typeahead-search' ).classes() ).not.toContain( 'cdx-typeahead-search--active' );
 		expect( wrapper.find( '.cdx-typeahead-search' ).classes() ).not.toContain( 'cdx-typeahead-search--expanded' );
 		expect( wrapper.vm.expanded ).toBeFalsy();
 	} );

packages/codex/src/components/typeahead-search/TypeaheadSearch.vue

@@ -282,7 +282,8 @@ export default defineComponent( {
 		// delay, to avoid momentarily showing them to users with fast connections.
 		const showPending = ref( false );
 
-		// Whether the TypeaheadSearch is being used; used for applying conditional styles.
+		// Whether the TypeaheadSearch input is focused.
+		// TODO: consider changing this variable and the one in Lookup to `isFocused` for clarity.
 		const isActive = ref( false );
 
 		// Current text input value; initially set to the initialInputValue prop.
@@ -320,8 +321,6 @@ export default defineComponent( {
 		// Get helpers from useSplitAttributes.
 		const internalClasses = computed( () => {
 			return {
-				// TODO: remove this class once T316893 is complete in Vector.
-				'cdx-typeahead-search--active': isActive.value,
 				'cdx-typeahead-search--show-thumbnail': props.showThumbnail,
 				'cdx-typeahead-search--expanded': expanded.value,
 				'cdx-typeahead-search--auto-expand-width': props.showThumbnail && props.autoExpandWidth