No, analog pins are usuable with digitalWrite() and pinMode() - but with different pin numbers (use the aliases A0, A1 etc).
Like this?
int LDRSensVal = analogRead(LDRPin);
Clearly, the pin IS being used as an analog pin, which, by definition, is INPUT only. Telling a pin that can be a digital pin in either direction or an analog pin that can be input only, that is is an input pin WHEN IT IS USED AS AN ANALOG PIN is what is unnecessary.
The call only affects the mode of the pin WHEN IT IS USED AS A DIGITAL PIN. That is not the case here, so "documenting" some other potential (but never used) mode of the pin is NOT helpful.