refactor: simplify content script injection (#18532)

typings/internal-ambient.d.ts

@@ -31,9 +31,6 @@ declare namespace NodeJS {
     log: NodeJS.WriteStream['write'];
     activateUvLoop(): void;
 
-    // Additional methods
-    getRenderProcessPreferences(): Array<Electron.RendererProcessPreference> | null;
-
     // Additional events
     once(event: 'document-start', listener: () => any): this;
     once(event: 'document-end', listener: () => any): this;
@@ -121,4 +118,4 @@ interface ResizeObserverEntry {
    * Element's content rect when ResizeObserverCallback is invoked.
    */
   readonly contentRect: DOMRectReadOnly;
-}
+}