I remove the spurs after they get long, I've seen some spurs grow around back into the leg. What we do is for the bantams (my bantam Cochin roo) is hold his leg firmly, gently twist the spur back and forth and soon it will pop off. The bleeding should stop on its own in a few minutes, if it doesn't, cornstarch sprinkled on with help it.
This does cause the rooster to be in pain. I only do it when the rooster gets hung up on feathers mounting the hens (he is a Klutz)
I do see him limping after a procedure and will only do it out of necessity. You also have to watch for infection, you just did something that would be like us pulling a finger nail off us. Its fine, will stop bleeding etc.
If your showing your bird, make sure to look up if the spurs are important. Also, do not pop the spurs off just prior to going to a show, as it don't look so great!
A demonstration from club president took a pair of small pliers to remove a standard roosters spur. It took two people, one to hold the rooster still, then carefully twist, like with the bantam. Only thing is, hold that leg firm, you don't want to break it!
Spurs do have a purpose, to use when a predator comes knocking on the door. Good luck!