WARNING:
Do NOT eliminate wiring without absolutely knowing what you are doing.
There are many a threads of those that have simply cut wires, thrown away switches, etc. only to discover those items were part of security or safety systems that caused the bus not to crank or start.
If you do want to "thin out" your electrical, it can be done, but surgically. Pictures, labeling what you're taking out and leaving (what it use to be used for). Go one thing at a time, then assure the bus still starts, drives, etc. so you know you didn't accidentally disable something you didn't mean to.
Okay, with that said, welcome.
Definitely keep that heater!
Go to this link
https://www.skoolie.net/forums/f10/ and scroll down to about the 10th thread about bus electrical ac and bus electrical dc.
Go to this link - Think before removing your AC
https://www.skoolie.net/forums/f9/th...a-c-27952.html (the first person who responded to your thread wrote this).
Best of luck.