Update otlp-exporter.mdx AppDynamics requirements (#383)

Removed AppDynamics private beta requirement.

Author: okilker

src/docs/components/otlp-exporter.mdx

@@ -70,10 +70,7 @@ AppDynamics without the need for additional plugins or non-OTLP exporters.
 
 ### Requirements
 
-Before you can use the AWS Distro for OpenTelemetry with the AppDynamics endpoint, you need:
-
-* You need AppDynamics SaaS Controller >= v21.2.0.
-* You need to be admitted to the AppDynamics OpenTelemetry private beta program.
+Before you can use the AWS Distro for OpenTelemetry with the AppDynamics endpoint, you need AppDynamics SaaS Controller >= v21.2.0.
 
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