Document URL: 
https://docs.openshift.com/container-platform/4.6/builds/securing-builds-by-strategy.html#builds-disabling-build-strategy-globally_securing-builds-by-strategy

Section Number and Name: 
Disabling access to a build strategy globally
--> 3. Ensure the build strategy subresources are also removed from these roles:
    4. For each role, remove the line that corresponds to the resource of the strategy to disable.

Describe the issue: 
There is no builds/docker、builds/source、builds/jenkinspipeline subresources in clusterrole/admin or clusterrole/edit.

$ oc get clusterrole admin -o yaml | grep builds
  - builds/details
  - builds
  - builds
  - builds/log
  - builds/clone
  - builds

$ oc get clusterrole edit -o yaml | grep builds
  - builds/details
  - builds
  - builds
  - builds/log
  - builds/clone
  - builds

Suggestions for improvement: 
Revise the step 3 and step 4, if these steps are not necessary, delete them. 
By the way, it seems worth mentioning that the steps introduced in the document about disabling access to a build strategy globally only take effect on the non-cluster-admin users. A cluster-admin user can still start a build even if all build strategies are disabled globally.

Additional information: