This reverts commit efe254de.

b/189557997 was addressed by removing .gitmodules in the AutoRoller:
https://skia-review.googlesource.com/c/buildbot/+/415736

Change-Id: Iec5ea73fce689f5286aedc486447ea0f498912b7
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/54868Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Jason Macnak <natsu@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>