Previously we tried to avoid applying a shader which didn't do anything
useful. Unfortunately we missed various edge cases. Just remove this
logic completely.

Bug: b/118386749
Test: dEQP-VK.renderpass*
Change-Id: I48f2f9f08ad491381db22af9f6f3430f7b4d4db1
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29728Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>