[web] Remove unused function parameter (#41700)

The `hasAutofillOverlay` and `cssSelectorPrefix` parameters aren't really used in any useful way. Let's remove them.

Author: mdebbar

lib/web_ui/lib/src/engine/embedder.dart

@@ -192,7 +192,6 @@ class FlutterViewEmbedder {
     shadowRoot.appendChild(shadowRootStyleElement);
     applyGlobalCssRulesToSheet(
       shadowRootStyleElement,
-      hasAutofillOverlay: browserHasAutofillOverlay(),
       defaultCssFont: defaultCssFont,
     );
 
@@ -433,7 +432,6 @@ DomElement createTextEditingHostNode(DomElement root, String defaultFont) {
   root.appendChild(styleElement);
   applyGlobalCssRulesToSheet(
     styleElement,
-    hasAutofillOverlay: browserHasAutofillOverlay(),
     cssSelectorPrefix: FlutterViewEmbedder.flutterViewTagName,
     defaultCssFont: defaultFont,
   );

lib/web_ui/lib/src/engine/global_styles.dart

@@ -9,7 +9,6 @@ import 'text_editing/text_editing.dart';
 // Applies the required global CSS to an incoming [DomCSSStyleSheet] `sheet`.
 void applyGlobalCssRulesToSheet(
   DomHTMLStyleElement styleElement, {
-  required bool hasAutofillOverlay,
   String cssSelectorPrefix = '',
   required String defaultCssFont,
 }) {

lib/web_ui/test/engine/global_styles_test.dart

@@ -20,7 +20,6 @@ void testMain() {
     domDocument.body!.append(styleElement);
     applyGlobalCssRulesToSheet(
       styleElement,
-      hasAutofillOverlay: browserHasAutofillOverlay(),
       defaultCssFont: _kDefaultCssFont,
     );
   });