[VecOps][NFC] Remove SmallVector-related comment from doxygen
[VecOps][NFC] Remove SmallVector-related comment from doxygen

olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root