remove dev preview from olm file (#80)

Issue #, if available:
N/A

Description of changes:
Preparing controller for GA.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: acornett21

olm/olmconfig.yaml

@@ -22,7 +22,7 @@ description: |-
 
 
   This controller is a component of the [AWS Controller for Kubernetes](https://github.com/aws/aws-controllers-k8s)
-  project. This project is currently in **developer preview**.
+  project.
 
 
   **Pre-Installation Steps**