perf(ivy): remove unused argument in hostBindings function (#34969)

We had some logic for generating and passing in the `elIndex` parameter into the `hostBindings` function, but it wasn't actually being used for anything. The only place left that had a reference to it was the `StylingBuilder` and it only stored it without referencing it again.

PR Close #34969

packages/compiler/src/render3/view/template.ts

@@ -520,7 +520,7 @@ export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver
 
   visitElement(element: t.Element) {
     const elementIndex = this.allocateDataSlot();
-    const stylingBuilder = new StylingBuilder(o.literal(elementIndex), null);
+    const stylingBuilder = new StylingBuilder(null);
 
     let isNonBindableMode: boolean = false;
     const isI18nRootElement: boolean =