test_runner: fix lint in assertion prototype test

Author: inoway46

test/sequential/test-runner-assertion-error-prototype.js

@@ -74,10 +74,11 @@ const wrappedMetadata = collectAssertionPrototypeMetadata({
 assert.deepStrictEqual(wrappedMetadata, arrayPrototypeMetadata);
 
 // Unsupported metadata shapes must be ignored safely.
-assert.doesNotThrow(() => applyAssertionPrototypeMetadata(arrayAssertionError, null));
-assert.doesNotThrow(() => applyAssertionPrototypeMetadata(arrayAssertionError, {
+// These calls are expected to be ignored (no throw, no mutation).
+applyAssertionPrototypeMetadata(arrayAssertionError, null);
+applyAssertionPrototypeMetadata(arrayAssertionError, {
   actual: { baseType: 'map', constructorName: 'ExtendedMap' },
-}));
+});
 
 // Base type mismatch should not rewrite the value prototype.
 const mismatchError = deserializeError(serializeError(objectAssertionError));