[Release 2.9.0] Remove k-NN (#3730)

Signed-off-by: Prudhvi Godithi <[email protected]>

manifests/2.9.0/opensearch-2.9.0.yml

@@ -32,15 +32,15 @@ components:
     checks:
       - gradle:properties:version
       - gradle:dependencies:opensearch.version
-  - name: k-NN
-    repository: https://github.com/opensearch-project/k-NN.git
-    ref: '2.9'
-    platforms:
-      - linux
-      - windows
-    checks:
-      - gradle:properties:version
-      - gradle:dependencies:opensearch.version
+#  - name: k-NN
+#    repository: https://github.com/opensearch-project/k-NN.git
+#    ref: '2.9'
+#    platforms:
+#      - linux
+#      - windows
+#    checks:
+#      - gradle:properties:version
+#      - gradle:dependencies:opensearch.version
   - name: geospatial
     repository: https://github.com/opensearch-project/geospatial.git
     ref: '2.9'