Revert "Make SkASSERT not break build in constexpr GrSwizzle method on GCC"

This reverts commit 2935638a1b163db63498fe3055197a58b968bd5d.

Reason for revert: valgrind errors

Original change's description:
> Make SkASSERT not break build in constexpr GrSwizzle method on GCC
> 
> Change-Id: I042b90e7c405505447662e6d187ca1519efd4743
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221342
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,brianosman@google.com

Change-Id: I6bc0f8f84212e3ce53f4d2198c4369db7f08ea3f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221537
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed