When pruning trees, these are the only cuts that should be made:

This cut is too close to the trunk of this tree, result

• Eliminating branches that rub against each other
• Removing limbs that interfere with wires
• Removing dead or weak limbs that pose a hazard or may lead to decay
• Removing diseased or insect infested limbs
• Creating better structure to lessen wind resistance and reduce the potential for storm damage
• Training young trees
• Removing limbs damaged by adverse weather conditions
• Thinning or removal of unnecessary branches
• Improving the shape or silhouette of the trees
• No branch should be removed without a reason