In Lightning Migration, We have an issue with changing QuickActions and buttons in Page layout under "Salesforce Mobile and Lightning Experience Actions" in the sandbox and retrieving the metadata and dpeloying the same. We are able to remove several standard buttons and quick actions from Salesforce Mobile and Lightning Experience Actions section in the sandbox but when we retrieve and deploy the metadata of the page layout, in the target sandbox/org we don't see those buttons being removed. Does any have same issue, how to manage the metadta and deploy the same in this case? 

Thanks in Advance.

Srinivasa Y