Extra useless deallocations weren't cleaned up properly.
Removed them.

Bug b/123244275

Change-Id: I418a4c09a870748551a92c1abb3986e94b32ba92
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27289Tested-by: Alexis Hétu <sugoi@google.com>
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>