🔥 Drop redundant not.toBeAny assertions in the fixture

The exact-equality `toEqualTypeOf` assertions already reject `any`, so the
`.not.toBeAny()` guards were redundant. Refresh the fixture header and
development/ci.md to match.

development/ci.md

@@ -164,9 +164,9 @@ source of truth) and documented in [README § Requirements](../README.md#require
 - **The fixture is a consumer, not a unit test.** `compat/fixture.ts` imports
   the package by name (`tiny-pattern-ts`), so it resolves through the `exports`
   map to `dist/index.d.ts` and exercises the emitted declarations' relative
-  `.ts` specifiers — not the source. `expectTypeOf` / `.not.toBeAny()` are
-  load-bearing: a bare compile would also pass if a declaration collapsed to
-  `any`; the exact-equality assertions reject that.
+  `.ts` specifiers — not the source. `expectTypeOf`'s exact-equality assertions
+  are load-bearing: a bare compile would also pass if a declaration collapsed to
+  `any`; they reject that.
 
 #### Rejected