Add a method to remove an attribute from a group in EavSetup

[stollr]

The class Magento\Eav\Setup\EavSetup, which is used to manage EAV attributes programmatically in setup scripts, provides a method to add attributes to groups and attribute sets. The method is called addAttributeToGroup.

But there is missing the inverse method to remove an attribute from a group and set.

The addition of such a method would be great.

[m2-assistant]

Hi @stollr. Thank you for your report.
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Add a comment to assign the issue: @magento I am working on this

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[stollr]

@magento I am working on this

[stollr]

PR was added and is ready for review :-)