Revert "Implement onMakeClone(const SkFontArguments& args) in class SkTypeface_fontconfig."

This reverts commit 96b1ecc25d00a3d52dcc51a788b0df0acdd1dad9.

Reason for revert: Breaking Google3, I think

Original change's description:
> Implement onMakeClone(const SkFontArguments& args) in class SkTypeface_fontconfig.
> 
> Create FontMgrFontConfigTest.cpp file to test the above function.
> 
> Change-Id: I7716355f702af3d6f25574305914f0b82a4147ce
> Reviewed-on: https://skia-review.googlesource.com/137133
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Ben Wagner <bungeman@google.com>

TBR=bungeman@google.com,herb@google.com,brucewang@google.com

Change-Id: I665de46d379f1b533358f0be644814aa4bfffb33
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/137240
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
4 files changed