chore: revert inconsequential change to test code

core/vm/contracts.libevm.go

@@ -92,7 +92,7 @@ func (t CallType) OpCode() OpCode {
 // regular types.
 func (args *evmCallArgs) run(p PrecompiledContract, input []byte, suppliedGas uint64) (ret []byte, remainingGas uint64, err error) {
 	if p, ok := p.(statefulPrecompile); ok {
-		// `suppliedGas` is already held by the args.
+		// `suppliedGas` is already held by the args, and captured by `env()`.
 		return p.run(args.env(), input)
 	}
 	// Gas consumption for regular precompiles was already handled by the native

core/vm/contracts.libevm_test.go

@@ -149,11 +149,11 @@ func TestNewStatefulPrecompile(t *testing.T) {
 
 	run := func(env vm.PrecompileEnvironment, input []byte, suppliedGas uint64) ([]byte, uint64, error) {
 		if got, want := env.StateDB() != nil, !env.ReadOnly(); got != want {
-			return nil, suppliedGas, fmt.Errorf("PrecompileEnvironment().StateDB() must be non-nil i.f.f. not read-only; got non-nil? %t; want %t", got, want)
+			return nil, 0, fmt.Errorf("PrecompileEnvironment().StateDB() must be non-nil i.f.f. not read-only; got non-nil? %t; want %t", got, want)
 		}
 		hdr, err := env.BlockHeader()
 		if err != nil {
-			return nil, suppliedGas, err
+			return nil, 0, err
 		}
 
 		out := &statefulPrecompileOutput{