Clean up dead/hosted code [zh2310] (#2430)

* Clean up dead/hosted code

* Remove schema conversion tool and related
* Remove cxg references
* Remove locust

* missed a spot

* Remove aws secret manager

* Merge branch 'main' into brodgers/2310/code-cleanup-v1

* cleanup merge

backend/server/default_config.py

@@ -71,7 +71,7 @@ dataset:
 
 external:
   # You can retrieve configuration parameters from this config file, the environment,
-  # the AWS secrets manager, or from the "cellxgene launch" command line arguments.
+  # or from the "cellxgene launch" command line arguments.
   # They are applied in that order, meaning that if a parameter is defined in more
   # than one location, the last one applied takes effect.
 
@@ -87,31 +87,6 @@ external:
      - name: CXG_SECRET_KEY
        path: [server, app, flask_secret_key]
        required: false
-
-  # AWS Secrets Manager
-  # This section describes how to map aws secrets to configuration parameters.
-  # The format is the region for the secrets manager, then a list of secrets.
-  # each secret has a name, and a list of values.
-  # Each entry in the list of values is a dictionary with three entries:
-  # key:  the key of the aws secret.
-  # path: the path within the cellxgene configuration to update.
-  # required: (default=False) a boolean.  If true, then it is an error if the key does not exist in the secret.
-  #
-  # example:
-  # aws_secrets_manager:
-  #   region: us-west-2
-  #    - name: my_first_secret
-  #      values:
-  #      - key: flask_secret_key
-  #        path: [server, app, flask_secret_key]
-  #        required: true
-  #      - key: db_uri
-  #        path: [dataset, user_annotations, db_uri]
-  #        required: true
-
-  aws_secrets_manager:
-    region: null
-    secrets: []
 """