test: remove deprecated API allowance flag

Remove the '--allow-deprecated-apis=true' flag
from the CLightningNode initialization in the test framework.

This will increase the possibility of detecting problems
before they occur, as support for the deprecated
cln api is no longer available.

testframework/clightning.go

@@ -84,7 +84,6 @@ func NewCLightningNode(testDir string, bitcoin *BitcoinNode, id int) (*CLightnin
 		fmt.Sprintf("--bitcoin-rpcport=%s", bitcoinRpcPort),
 		fmt.Sprintf("--bitcoin-datadir=%s", bitcoin.DataDir),
 		fmt.Sprintf("--developer"),
-		fmt.Sprintf("--allow-deprecated-apis=true"),
 	}
 
 	// socketPath := filepath.Join(networkDir, "lightning-rpc")