Remove static initializer for SkOpts::Init()

Static initializers run in a confusing unspecified order,
so it's best to have as few of them as possible.

Most tools and clients I can find already call SkGraphics::Init(),
(or equivalently create an SkAutoGraphics) which calls SkOpts::Init():
   - Chrome
   - Chrome renderer
   - Android
   - DM
   - nanobench
   - SampleApp
   - VisualBench
   - the old debugger

Seems like the only thing relying on this static initializer today is
the new debugger, fixed here.

TBR=reed@google.com

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1903503002

Review URL: https://codereview.chromium.org/1903503002
3 files changed