Remove service-deployed mongo helm values and documentation. (#314)

* remove service-deployed mongo db documentation and helm values

* apply example rewording

---------

Co-authored-by: Christian Nunnally <christian.nunnally@emerson.com>

Author: Christian-Nunnally

getting-started/templates/systemlink-secrets.yaml

@@ -10,7 +10,7 @@
 global:
   secrets:
     mongodb:
-      ## <ATTENTION> - If `global.mongodb.install` is false, configure the external MongoDB connection string to be used by services in this deployment.
+      ## <ATTENTION> - Configure the external MongoDB connection string for use by services in this deployment.
       #
       # If you are setting credentials per service (e.g. assetservice.secrets.mongodb.servicePassword) leave the placeholders
       # <username> and <password> in the connection string. These will be replaced dynamically when deploying.
@@ -23,8 +23,6 @@ global:
       # - MongoDB Atlas: mongodb+srv://<username>:<password>@my-atlas-cluster.mongodb.net/<database>
       # - MongoDB Community: mongodb://<username>:<password>@my-mongodb-cluster-0,my-mongodb-cluster-1,my-mongodb-cluster-2/<database>?replicaSet=rs0
       # - MongoDB Community (single set of credentials): mongodb://myusername:myPassw0rD@my-mongodb-cluster-0,my-mongodb-cluster-1,my-mongodb-cluster-2/<database>?replicaSet=rs0
-      #
-      # If `global.mongodb.install` is `true` leave the connection string as a blank string or comment it out.
       connection_string: ""
 
 ## Secrets that apply to the entire application.

getting-started/templates/systemlink-values.yaml

@@ -86,16 +86,6 @@ global:
     ##
     cdnEndpoint: "https://web-sdk.ni.com/"
   ##
-  ## MongoDB Database Configuration.
-  ## Many Systemlink Enterprise services utilize MongoDB databases for data storage. Customers can deploy their own MongoDB instance
-  ## or utilize a managed solution such as MongoDB Atlas. Once provisioned provide the connection details in global.secrets.mongodb.connection_string.
-  ##
-  mongodb:
-    ## Enable or disable installation of per-service MongoDB instances.
-    #  <ATTENTION> - If you do *not* have your own MongoDB instance set this (`global.mongodb.install`) to `true`.
-    ##
-    install: false
-  ##
   ## Specify secrets containing trusted certificates that should be installed in all the necessary applications.
   ## The secrets must be deployed manually prior to installing this chart. Config maps may be used when it is not possible to use a secret.
   ## Example: