Revert "Allow tracking of Precompositions onEnter/onExit"

This reverts commit 510e0c57dad5b2b2001c02f80dee051060674ce7.

Reason for revert: probably blocking g3 roll

Original change's description:
> Allow tracking of Precompositions onEnter/onExit
>
> Change-Id: I065288b212d8ffc4d0ca127940e524799f59aff7
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/454976
> Reviewed-by: Avinash Parchuri <aparchur@google.com>
> Reviewed-by: Florin Malita <fmalita@google.com>
> Commit-Queue: Avinash Parchuri <aparchur@google.com>

Change-Id: I2e5b12bd45d48fc98ee799a733740e4cd8ae3dcb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/456921
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
2 files changed