Removed unused scroll packet pattern
Floating point variant marked for "free mouse mode" was never invoked, regardless of mobile mouse app mode. Presumably older versions used a slightly different protocol with floating point offsets for free mouse mode. Now, both free mouse and trackpad mode use integer scroll motion offsets.
https://github.com/anoved/mmserver/commit/46d0b88b2f8de26bf03a9504c8926ae6a6c36ab7#commitcomment-4018459