Accessibility: Screen Reader Thinks SelectBox is a Button on Mac (#6216)

* Stop reading dropdowns as buttons for mac

* Remove role of combobox for sql selectbox

src/sql/base/browser/ui/selectBox/selectBox.ts

@@ -83,9 +83,6 @@ export class SelectBox extends vsSelectBox {
 			this.element = dom.append(container, $('.monaco-selectbox.idle'));
 		}
 
-		// explicitly set the accessible role so that the screen readers can read the control type properly
-		this.selectElement.setAttribute('role', 'combobox');
-
 		this._selectBoxOptions = selectBoxOptions;
 		let focusTracker = dom.trackFocus(this.selectElement);
 		this._register(focusTracker);