GitLab CI: drop unused archive stage

Author: greenrobot-team

.gitlab-ci.yml

@@ -1,6 +1,5 @@
 stages:
   - build
-  - archive
 
 build_project:
   stage: build
@@ -13,4 +12,4 @@ build_project:
     - xcodebuild clean build -workspace NotesExample.xcworkspace -scheme NotesExample-macOS -destination 'platform=OS X,arch=x86_64'
 
 variables:
-  GIT_SUBMODULE_STRATEGY: recursive
+  GIT_SUBMODULE_STRATEGY: recursive