tests: Use a default of supports_cli=True (instead of supports_cli=False)

test/functional/wallet_createwallet.py

@@ -15,7 +15,6 @@ class CreateWalletTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = False
         self.num_nodes = 1
-        self.supports_cli = True
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()