Charcoal Cannister...Removal ????

I would leave it in the car, it's not hurting performance. Remove it and clean it up, paint the mounting bracket and replace worn hoses. The charcoal canister is part of the Evaporation Control System for the fuel tank, it helps purge gas fumes and vents the tank. If you remove it you will still need to vent the tank. You could just remove the canister and leave the vent line open to the atmosphere but you will here a hissing sound under the hood after you shut the car off. Another concern may be your state inspection if you live in a state that that looks closely for pollution control.