Revert "[Hub Generated] Review request for Microsoft.Resources to add…

… version stable/2021-04-01 (#15297)"

This reverts commit 61d502e.

specification/resources/resource-manager/Microsoft.Resources/stable/2021-04-01/resources.json

@@ -2958,7 +2958,7 @@
             "in": "query",
             "required": false,
             "type": "string",
-            "description": "The filter to apply on the operation.<br><br>Filter comparison operators include `eq` (equals) and `ne` (not equals) and may be used with the following properties: `location`, `resourceType`, `name`, `resourceGroup`, `identity`, `identity/principalId`, `plan`, `plan/publisher`, `plan/product`, `plan/name`, `plan/version`, and `plan/promotionCode`.<br><br>For example, to filter by a resource type, use `$filter=resourceType eq 'Microsoft.Network/virtualNetworks'`<br><br><br>`substringof(value, property)` can also be used to filter for substrings of the following currently-supported properties: `name` and `resourceGroup`.<br><br>For example, to get all resources with 'demo' anywhere in the resource name, use `$filter=substringof('demo', name)`<br><br>Multiple substring operations can also be combined using `and`/`or` operators.<br><br><br>Resources can also be filtered by tag names and values. For example, to filter for a tag name and value, use `$filter=tagName eq 'tag1' and tagValue eq 'Value1'`. Not that when resources are filtered by tag name and value, <b>the originals tags for each resource will not returned in the results.</b> Any list of additional properties queried via `$expand` may also not be compatible when filtering by tag names/values. <br><br>For tag names only, resources can also be filtered by prefix  using the following syntax: `$filter=startswith(tagName, 'depart')`. This query will return all resources with a tag name prefixed by the phrase `depart` (i.e. `department`, `departureDate`, `departureTime`, etc.)  <br><br><br>Lastly, some properties can be combined when filtering resources, which include the following: `substringof() and/or resourceType`, `plan and plan/publisher and plan/name`, and `identity and identity/principalId`."
+            "description": "The filter to apply on the operation.<br><br>The properties you can use for eq (equals) or ne (not equals) are: location, resourceType, name, resourceGroup, identity, identity/principalId, plan, plan/publisher, plan/product, plan/name, plan/version, and plan/promotionCode.<br><br>For example, to filter by a resource type, use: $filter=resourceType eq 'Microsoft.Network/virtualNetworks'<br><br>You can use substringof(value, property) in the filter. The properties you can use for substring are: name and resourceGroup.<br><br>For example, to get all resources with 'demo' anywhere in the name, use: $filter=substringof('demo', name)<br><br>You can link more than one substringof together by adding and/or operators.<br><br>You can filter by tag names and values. For example, to filter for a tag name and value, use $filter=tagName eq 'tag1' and tagValue eq 'Value1'. When you filter by a tag name and value, the tags for each resource are not returned in the results.<br><br>You can use some properties together when filtering. The combinations you can use are: substringof and/or resourceType, plan and plan/publisher and plan/name, identity and identity/principalId."
           },
           {
             "name": "$expand",