KNN update for 1.6.0

Author: aetter

docs/install/plugins.md

@@ -187,7 +187,7 @@ sudo bin/elasticsearch-plugin install https://d3g5vo6xdbdb9a.cloudfront.net/down
 
 ### KNN
 
-KNN is currently only available as part of the Docker image.
+KNN is only available as part of the all-in-one installs: Docker, RPM, and Debian.
 {: .warning }
 
 

docs/knn/index.md

@@ -8,9 +8,6 @@ has_toc: false
 
 # KNN
 
-KNN is currently only available as part of the Docker image.
-{: .warning }
-
 Short for its associated *k-nearest neighbors* algorithm, the KNN plugin lets you search for points in a vector space and find the "nearest neighbors" for those points by Euclidean distance. Use cases include recommendations (for example, an "other songs you might like" feature in a music application), image recognition, and fraud detection. For background information on the algorithm, see [Wikipedia](https://en.wikipedia.org/wiki/K-nearest_neighbors_algorithm).