removing version matrix doc

Author: kmurphypolygon

docs/cdk/version-matrix.md

@@ -53,8 +53,6 @@ nav:
   - CDK:
       - CDK: cdk/index.md
       - Overview: cdk/overview.md
-      - Releases:
-        - Version compatibility matrix: cdk/version-matrix.md
       - Get started: 
         - Local deployment guide: cdk/getting-started/local-deployment.md
       - Concepts: