Remove CQ for unsupported branch chrome/m104

Change-Id: I07b9852af8b450094cac261529d97f542c4368b5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/591480
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Rakshit Sharma <sharaks@google.com>
Reviewed-by: Eric Boren <borenet@google.com>