Sometimes removing the computer is actually useful...
I've been riding for years now with my trusty cat eye computer and I notice that I always try and ride faster than my current average thanks to the little arrows that indicate faster/slower than average speeds. This is great and it helps constantly increase my output.
Today my good bike threw a spoke in my pre dawn ride. I limped her home and switched to my backup older bike which is computer less for my 30km round trip commute. Older bike, gear ratios lower so it was a tad harder. BUT I found the lack of a computer telling me to go faster actually made for a more fun ride.
I think I'm going to leave the computer at home once a week just so I can enjoy the scenery and not focus on getting to turn around points faster.