remove spurious comments
remove spurious comments

These don't appear to make any sense given their context. The
commit log also does not reveal anything.

Discovered due to spurious clang-format indenting:
https://bugs.llvm.org/show_bug.cgi?id=35930

Change-Id: I732a66056ba4c05e3e132a2f236fe10f7a282900

webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx