Remove iOS jobs from CQ

(Hopefully) temporary issues signing the test binaries.

Change-Id: I8ae250093b20a1a4bde63d0d203946e3af682033
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/669178
Reviewed-by: Ravi Mistry <rmistry@google.com>
2 files changed