[joehan]

Description

Resolves Buganizer b/582886459 (parent goal b/565072516).

Turns off @typescript-eslint/no-use-before-define by removing its .eslintrc.js overrides instead of keeping "off" entries:

• Deleted "@typescript-eslint/no-use-before-define": ["warn", { functions: false, typedefs: false }] (and its TODO(bkendall) comment) from the *.ts override in .eslintrc.js.
• Deleted the now-redundant "@typescript-eslint/no-use-before-define": "off" entry from the *.js override in .eslintrc.js. None of the extended ESLint/TypeScript configs enable @typescript-eslint/no-use-before-define or base no-use-before-define, so deleting both entries disables the rule everywhere.
• Removed the now-unused // eslint-disable-next-line @typescript-eslint/no-use-before-define comment in src/ensureApiEnabled.ts.

Skipped file: Left the // eslint-disable-next-line @typescript-eslint/no-use-before-define comment in scripts/integration-helpers/cli.ts untouched to avoid a merge conflict with open PR #11120 (which rewrites lines 50–75). Since reportUnusedDisableDirectives is not enabled, leaving it produces no warnings or errors.

(Note for reviewers: if you prefer keeping @typescript-eslint/no-use-before-define enabled for same-scope use-before-define rather than turning it off, setting ["warn", { functions: false, classes: false, variables: false, enums: false, typedefs: false }] also eliminates all 38 existing warnings across the codebase.)

Scenarios Tested

• ESLint.calculateConfigForFile on src/apiv2.ts, src/apiv2.spec.ts, and scripts/sanitize-lockfile.js: confirmed @typescript-eslint/no-use-before-define and no-use-before-define both evaluate to undefined.
• npx eslint --config .eslintrc.js --ext .ts,.js . --format json: confirmed 0 errors and 0 @typescript-eslint/no-use-before-define messages across 1,434 files.
• npm run lint:quiet: passed (ESLint + Prettier).
• npm run build, npx tsc --noEmit -p tsconfig.json, and npm run test:compile: passed.
• npx mocha src/ensureApiEnabled.spec.ts: 21 passing.
• npm run mocha: 5,934 passing, 11 pending (1 unrelated EADDRINUSE on port 52672 in src/apiv2.spec.ts "with a proxy" hook from concurrent test runs on the shared host).

Sample Commands

N/A (dev-only ESLint configuration change).

[gemini-code-assist]

Code Review

This pull request removes the @typescript-eslint/no-use-before-define lint rule from the ESLint configuration and cleans up an obsolete eslint-disable-next-line comment in src/ensureApiEnabled.ts. I have no additional feedback to provide as these changes are straightforward and clean up the codebase.