how to delete the layer mask completely from generative fill layer

I'm no stranger to layer masks but the masks created when generating with "generative fill" do not delete completely.  The thumbnail of the image shows the entire "block or Square" of what was generated but when deleted, filled in, rasterized, expanded, copy-pasted to a new comp., all paths or channels, or "black/white" mask areas has been filled or erased or merged it NEVER seems to give what were shows on the thumbnail icon/image in the layers panel.  ??

HOW DO I generate fill a layer, then remove the mask completely, and get the entire layer's content that it generated and has shown me in the layer thumbnail?

HERE ARE EXAMPLE IMAGES OF A PATTERN I MADE. 

Thumbnail square shows entire documents/file filled with pattern but you can't delete paste or get past the "shirt outline" that it thought it should generate

I'VE TRIED:

• deleting/applying mask

• coloring in mask layer/area with white or black to fil document siz

• copy-pasting to a new layer

• creating a new mask on top

• rasterizing while keeping mask and then coloring layer mask/deleting

• making doc/image larger ...then all methods above

• copy-pasting into new layers or document

• right-clicking on the mask layer and icon thumbnail. and (all the options here)

. Tried using both Beta and standard Photoshop App for months now so many versions