rsi_hw_iface: decide whether AXISCORRMON object should be kept

[gavanderhoorn]

From #54 (comment):

I am uncertain if the AXISCORRMON object is really needed and should be removed.

[BrettHemes-3M]

I think we can remove this all together, as it is redundant to the limits currently set within the AXISCORR object and we don't have any external axes.