Scope reduction in a project is generally seen as a positive activity. In small applications this is generally true. This is not always the case though, especially in an enterprise environment. The key determining factor is the down steam impact of removing the feature from scope.
If the item has already been planned for by other project teams the rework could be more expensive then what is being saved. Does eliminating the task mean that other applications need to plan for development or processes to cover the gap. The requirement needs to be of an isolated nature such that the only effect is to that particular component. At the least the impact needs to be understood and acknowledged by the stakeholders.
As with most decisions on a project you need to weigh the benefits and the costs. Along with the collateral damage you should also consider the long term implications. If not implementing something now means implementing it later at a higher cost you may want to reconsider. Be a surgeon and not a lumber jack. Only cut away what you have to.