Revert of specialize setConcat for scale+translate (patchset #1 id:1 of https://codereview.chromium.org/620433002/)

Reason for revert:
Experimental to see if this revert "fixes" nanobench on the main console.

Original issue's description:
> specialize setConcat for scale+translate, helps drawText perf
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/e8db3ef2a2161084fa8eb1fd1d54c35bfff52d6c

TBR=jvanverth@google.com,reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/620973003
2 files changed