test: drop FIPS state restore at end of cipher/hash cache test

Each test runs in its own process so restoring the initial FIPS state
is unnecessary.

Author: srikanth-karthi

test/parallel/test-crypto-ciphers-hashes-fips-cache.js

@@ -80,7 +80,3 @@ assert.deepStrictEqual(
   hashesWithoutFips,
   'getHashes() should match pre-FIPS list after setFips(false)'
 );
-
-// Restore the original FIPS state.
-if (initialFips)
-  setFips(true);