Remove tracing of memory allocations.

Change-Id: Ia906e27d2ded0cafb1c597a369e7a5fe58b0bae1
Reviewed-on: https://swiftshader-review.googlesource.com/3020
Reviewed-by: Greg Hartman <ghartman@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>