Remove functional part of unique glyphs from the builder

This does not affect allocation.

Change-Id: I7b33104d7a8604d30473bc41155d3b6d270b12fb
Reviewed-on: https://skia-review.googlesource.com/c/165441
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed