🔥 Remove the example index spec

The spec only exercised the template's match/P example API. Removing it
first lets the modules and exports it imports go next without leaving a
dangling reference.

development/testing.md

@@ -27,8 +27,8 @@ before the implementation.
 
 - Runtime-first (classic red/green): it verifies the value, not the contract,
   and the contract is the product.
-- Testing the type only: it would not catch handler wiring, `exhaustive()`
-  throwing, or the `otherwise` fallback (see `src/index.test.ts`).
+- Testing the type only: it would not catch handler dispatch or the `_`
+  fallback (see `src/primitive.test.ts`).
 
 The runner is `node --test --strip-types "src/**/*.test.ts"` and the tiers are in
 [CONTRIBUTING.md § Development commands](../CONTRIBUTING.md#development-commands).
@@ -66,7 +66,7 @@ separated by a blank line; an empty block drops its label.
 ## Known issues
 
 - The type-aware linter misidentifies `expectTypeOf()` as a floating promise, so
-  test files that use it (`src/index.test.ts`, `src/primitive.test.ts`) carry a
+  test files that use it (`src/primitive.test.ts`) carry a
   file-level `oxlint-disable
 typescript/no-floating-promises` with an explanatory comment. It is a known
   false positive, not a rule worth disabling project-wide (see