Spring Remove never use code in AbstractNestablePropertyAccessor

'if (propValue == null)' ,' isAutoGrowNestedPaths()' always returns false. So remove the never accessable code, direct throw exception.

Comment From: yilianhuaixiao

@mdeinum I am not sure about your words. The propValue represents the direct souce of the tokens paremeter. For example, if the tokens.canonicalName is listOfMaps[0]['luckyNumber']. the propValue represents listOfMaps[0] object.

And in getPropertyValue method in AbstractNestablePropertyAccessor:

 if (isAutoGrowNestedPaths()) {
                        value = setDefaultValue(new PropertyTokenHolder(tokens.actualName));
                    }

in

    private Object setDefaultValue(PropertyTokenHolder tokens) {
        PropertyValue pv = createDefaultPropertyValue(tokens);
        setPropertyValue(tokens, pv);
        Object defaultValue = getPropertyValue(tokens);
        Assert.state(defaultValue != null, "Default value must not be null");
        return defaultValue;
    }

Default value must not be null.

So once the propValue == null , it means isAutoGrowNestedPaths always be false.

Comment From: snicoll

Yes I agree with @mdeinum here. Thanks for the PR, in any case.