Revert "Always attempt to flatten images with mskp image ids"
Revert "Always attempt to flatten images with mskp image ids"

This reverts commit eca04eeeb8d8e3e69b03b2862f4e611364377fc8.

Reason for revert: breaks playback for regular skp files

Original change's description:
> Always attempt to flatten images with mskp image ids
>
> b:skia:11041
>
> Change-Id: I9eeac07b5cad7809d1e8ec9f9b12149f016227e0
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/341798
> Reviewed-by: Leandro Lovisolo <lovisolo@google.com>
> Commit-Queue: Nathaniel Nifong <1ce561679465ea4956c6210637580cd7ba456816@google.com>

TBR=1ce561679465ea4956c6210637580cd7ba456816@google.com,lovisolo@google.com

Change-Id: I034229b5b22aa478cdcc26d3a0bcb4e543606c04
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/342462
Reviewed-by: Nathaniel Nifong <1ce561679465ea4956c6210637580cd7ba456816@google.com>
Commit-Queue: Nathaniel Nifong <1ce561679465ea4956c6210637580cd7ba456816@google.com>

aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia