Delete non-normative claim that vmv<nr>r.v doesn't depend on vtype

The normative text says that vmv<nr>r.v "operates as though EEW=SEW",
meaning that it _does_ depend on vtype.

The semantic difference becomes visible through vstart, since vstart is
measured in elements; hence, how to set vstart on an interrupt, or
interpret vstart upon resumption, depends on vtype.