Remove orphaned anchors in .gitlab-ci.yml

These were left there after previous refactors.

.gitlab-ci.yml

@@ -259,10 +259,6 @@ stages:
     - if: '$CI_PIPELINE_SOURCE =~ /^(api|pipeline|schedule|trigger|web)$/'
     - if: '$CI_COMMIT_TAG != null'
 
-.api-pipelines-schedules-triggers-web-triggering-rules: &api_pipelines_schedules_triggers_web_triggering_rules
-  rules:
-    - if: '$CI_PIPELINE_SOURCE =~ /^(api|pipeline|schedule|trigger|web)$/'
-
 .default-triggering-rules_list: &default_triggering_rules_list
   - if: '$CI_PIPELINE_SOURCE =~ /^(api|merge_request_event|pipeline|schedule|trigger|web)$/'
   - if: '$CI_COMMIT_TAG != null'
@@ -367,8 +363,7 @@ stages:
   <<: *base_image
   stage: performance
   rules:
-    - &shotgun_rule_mr
-      if: '$CI_MERGE_REQUEST_DIFF_BASE_SHA != null'
+    - if: '$CI_MERGE_REQUEST_DIFF_BASE_SHA != null'
       variables:
         BASELINE: '$CI_MERGE_REQUEST_DIFF_BASE_SHA'
     - &shotgun_rule_tag
@@ -1622,9 +1617,6 @@ shotgun:doh-get:
     SHOTGUN_EVAL_THRESHOLD_LATENCY_PCTL_MAX: 0.4  # bump from the default due to increased tail-end jitter
   rules: *shotgun_rules_manual_mr
 
-.stress-test: &stress_test
-  stage: performance
-
 generate-stress-test-configs:
   <<: *base_image
   <<: *default_triggering_rules