ci: Fix 'needs' for the 'rspec:feature-flags' job

Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/rails.gitlab-ci.yml

@@ -466,11 +466,7 @@ rspec:feature-flags:
     - .coverage-base
     - .static-analysis:rules:ee-and-foss
   stage: post-test
-  needs:
-    - setup-test-env
-    - static-analysis
-    - memory-static
-    - memory-on-boot
+  needs: ["static-analysis"]
   script:
     - !reference [.minimal-bundle-install, script]
     - if [ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]; then