Update readme.python.md(Datadog) (#13540)

* Update readme.python.md

* Update readme.python.md

Author: msyyc

specification/datadog/resource-manager/readme.python.md

@@ -12,7 +12,6 @@ azure-arm: true
 license-header: MICROSOFT_MIT_NO_VERSION
 package-name: azure-mgmt-datadog
 no-namespace-folders: true
-package-version: 1.1.0
 ```
 
 ``` yaml $(python) && $(python-mode) == 'update' && $(track2)