Disable safari tests

Broken on mojave-base even with sudo safaridriver --enable
(cirruslabs/macos-image-templates#14).

Author: KronicDeth

.cirrus.yml

@@ -134,14 +134,14 @@ task:
   enable_safari_driver_script: sudo safaridriver --enable
   lumen_web_test_script: |
     pushd lumen_web
-    wasm-pack test --headless --chrome --firefox --safari
+    wasm-pack test --headless --chrome --firefox
     popd
   examples_spawn_chain_build_script: |
     pushd examples/spawn-chain
     wasm-pack build
     popd
   examples_spawn_chain_test_script: |
     pushd examples/spawn-chain
-    wasm-pack test --headless --chrome --firefox --safari
+    wasm-pack test --headless --chrome --firefox
     popd
   before_cache_script: rm -rf $CARGO_HOME/registry/index