The root cause of a shader call stack overflow was fixed in
https://swiftshader-review.googlesource.com/c/SwiftShader/+/24628
All shaders should now be validated not to exceed our call stack size
before reaching this lowering stage of compilation. Thus the run-time
checks can be removed.

This partially reverts
https://swiftshader-review.googlesource.com/c/SwiftShader/+/23568

Bug b/123587120

Change-Id: I04fc2613da7526992dd52c323deca8d9ad2c30c0
Reviewed-on: https://swiftshader-review.googlesource.com/c/24648
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>