Revert "fix: search input a11y issue (#679)" (#686)

This reverts commit a68d2a4.

Author: Sylvain Pace

src/lib/DocSearch.js

@@ -80,7 +80,6 @@ class DocSearch {
       this.autocompleteOptions.cssClasses || {};
     this.autocompleteOptions.cssClasses.prefix =
       this.autocompleteOptions.cssClasses.prefix || 'ds';
-   this.autocompleteOptions.ariaLabel = this.autocompleteOptions.ariaLabel || $(this.input)[0].getAttribute('aria-label') || 'search input';
 
 
     this.isSimpleLayout = layout === 'simple';