### Godot version

v4.0.beta13.official [caacade56]

### System information

Windows 8.1

### Issue description

The `Unreachable code (statement after return) in function 'function_name()'` warning is given for functions that do not have unreachable code. The same code does not give this warning in v3.5.stable.official [991bb6ac7].

### Steps to reproduce

```
func warning(i: int) -> void:
  if i == 0:
    pass
  elif i == 1:
    return
  else:
    return
  print("yeah")
```

Removing either the `elif` or the `else` removes the warning.

### Minimal reproduction project

N/A; code in reproduction steps can be placed in any blank gdscript file to trigger the error.
case GDScriptTokenizer::Token::EQUAL_EQUAL:
			operation->operation = BinaryOpNode::OP_COMP_EQUAL;
			operation->variant_op = Variant::OP_EQUAL;
			break;
		case GDScriptTokenizer::Token::BANG_EQUAL:
			operation->operation = BinaryOpNode::OP_COMP_NOT_EQUAL;
			operation->variant_op = Variant::OP_NOT_EQUAL;
			break;
		case GDScriptTokenizer::Token::LESS:
			operation->operation = BinaryOpNode::OP_COMP_LESS;
			operation->variant_op = Variant::OP_LESS;
			break;
		case GDScriptTokenizer::Token::LESS_EQUAL:
			operation->operation = BinaryOpNode::OP_COMP_LESS_EQUAL;
			operation->variant_op = Variant::OP_LESS_EQUAL;
			break;
		case GDScriptTokenizer::Token::GREATER:
			operation->operation = BinaryOpNode::OP_COMP_GREATER;
			operation->variant_op = Variant::OP_GREATER;
			break;
		case GDScriptTokenizer::Token::GREATER_EQUAL:
			operation->operation = BinaryOpNode::OP_COMP_GREATER_EQUAL;
			operation->variant_op = Variant::OP_GREATER_EQUAL;
			break;
		default:
			return nullptr; 
	}
	return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_ternary_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {