Remove filterable status from LKE fields that are not filterable

Author: Adam Mohammed

openapi.yaml

@@ -15748,16 +15748,13 @@ components:
         # LKEClusterRequestBody but otherwise inherit all of the original
         # sub-properties.
         label:
-          x-linode-filterable: true
           x-linode-cli-display: 2
           example: lkecluster12345
         region:
           readOnly: true
-          x-linode-filterable: true
           x-linode-cli-display: 3
           example: us-central
         version:
-          x-linode-filterable: true
           example: "1.16"
         tags:
           example:
@@ -15815,7 +15812,6 @@ components:
           type: string
           description: >
             The Node's ID.
-          x-linode-filterable: true
           example: "123456"
         instance_id:
           type: string