AttributeRemover

From Fmepedia

AttributeRemover is a Workbench Transformer. Removes the attributes chosen from the feature. This is normally not necessary unless the feature will later be processed by a transformer that merges attributes onto it from other features.

In such a case, if the other features have attributes with the same names as this feature, the attributes must first be removed for the merge to occur.

The AttributeKeeper offers similar functionality, but instead of selecting the attributes you want to remove, you select the attributes you want to keep.