Take ios64_compile out of the CQ.

It appears to need a newer toolchain and we're currently using the 10.9
swarming pool. Take it out of rotation for now. Will sort it out
tomorrow.

Change-Id: If37421732045a92517de6ee76f3ba6abe98a7fe2
Reviewed-on: https://boringssl-review.googlesource.com/16149
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 4f6ea47..8516c29 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -61,7 +61,9 @@
       builders { name: "linux_fips_noasm_asan" }
 
       builders { name: "ios_compile" }
-      builders { name: "ios64_compile" }
+      # TODO(davidben): Restore this builder once it's been switched to a
+      # newer macOS version.
+      # builders { name: "ios64_compile" }
 
       builders { name: "android_arm_compile" }
       builders { name: "android_aarch64_compile" }