Revert "skslc now automatically turns on derivatives support"

This reverts commit 311742bd0eac6fad150bf8f0a4e2809679464e47.

Reason for revert: Android try failure

Change-Id: I6e92b49df1c8f692da947b277067b9003a9367d0
Reviewed-on: https://skia-review.googlesource.com/3600
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
17 files changed