[infra] Remove CheckGeneratedFiles recipe

This was ported to a taskdriver in https://skia-review.googlesource.com/c/skia/+/599236

Bug: b/257465256
Change-Id: I141a9f3774b695cb0dbdaee8385bceb9c91b5c01
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/603117
Reviewed-by: Eric Boren <borenet@google.com>
6 files changed