Know nothing much about light twins but...
Assuming these are not electrical boots.....
On larger aircraft the (pneumatic) boots are often recessed (joggled) into the wing L/E. Removing the boots will give you more drag than patched boots. On top of that all pneumatic air inlets need to be patched up=more drag, potentially.
De-icers are part of type certificate. Remove them officially and you will have to recertify/prove that the aircraft flies OK/safe in all "book" conditions.
On second thoughts, light twins must be way different from big transports otherwise noone in his right mind would suggest removing them.
The floor is to the lightaircraft experts, sorry I interupted.......
