Photo #1 is the fuel expansion tank. If you fill up in the dead of winter, then teleport to Death Valley, the fuel might expand enough to spill over into that expansion tank. Otherwise, you can probably just delete it. It looks like it's about to rust through, anyway.
Photo #2 is the fresh air lines for the EGR solenoid and PCV breather. The PCV line was rendered obsolete by a recall. And since you don't have a stock air cleaner assembly (or even a stock engine), the EGR line isn't needed either. You can delete them.
Photo #3 is the charcoal canister. It's your call whether or not to delete it. Although, I personally would want to keep it. Keep in mind that if you do keep it, and decide to relocate it, it needs to be higher than the fuel tank, so condensed fuel vapor can drain back into the tank.