rm mentioned generator from kubectl run

Author: n0npax

content/en/docs/reference/kubectl/conventions.md

@@ -17,7 +17,6 @@ For a stable output in a script:
 
 * Request one of the machine-oriented output forms, such as `-o name`, `-o json`, `-o yaml`, `-o go-template`, or `-o jsonpath`.
 * Fully-qualify the version. For example, `jobs.v1.batch/myjob`. This will ensure that kubectl does not use its default version that can change over time.
-* Specify the `--generator` flag to pin to a specific behavior when you use generator-based commands such as `kubectl run` or `kubectl expose`.
 * Don't rely on context, preferences, or other implicit states.
 
 ## Best Practices