docs(docs-infra): clean up TODO comment, unused imports, and helper function

Author: MeAkib

adev/shared-docs/pipeline/api-gen/rendering/index.mts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import {existsSync, mkdirSync, readFileSync, writeFileSync} from 'fs';
+import {mkdirSync, readFileSync, writeFileSync} from 'fs';
 import path from 'path';
 import {CliCommand} from './cli-entities.mjs';
 import {DocEntry} from './entities.mjs';

adev/shared-docs/pipeline/api-gen/rendering/styling/css-classes.mts

@@ -6,8 +6,6 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-// TODO(jelbourn): all of these CSS classes should use the `docs-` prefix.
-
 export const API_REFERENCE_CONTAINER = 'docs-api';
 
 export const PARAM_KEYWORD_CLASS_NAME = 'docs-param-keyword';

adev/shared-docs/pipeline/api-gen/rendering/templates/class-member.tsx

@@ -17,7 +17,6 @@ import {
 } from '../entities/categorization.mjs';
 import {MemberEntryRenderable, MethodEntryRenderable} from '../entities/renderables.mjs';
 import {
-  PARAM_KEYWORD_CLASS_NAME,
   REFERENCE_MEMBER_CARD,
   REFERENCE_MEMBER_CARD_BODY,
   REFERENCE_MEMBER_CARD_HEADER,

adev/shared-docs/pipeline/api-gen/rendering/templates/header-api.tsx

@@ -123,13 +123,6 @@ function tagInVersionString(label: string, tag: {version: string | undefined} |
   return <>{label}</>;
 }
 
-function tagInVersionTooltip(
-  label: string,
-  tag: {version: string | undefined} | undefined,
-): string {
-  return tag?.version ? `${label} since ${tag.version}` : label;
-}
-
 function getEntryTypeDisplayName(entryType: EntryType | string): string {
   switch (entryType) {
     case EntryType.NgModule: