feat(theming): expose the sass function `theme-remove`

[nzbin]

Feature Description

https://github.com/angular/components/blob/956b86fc98241e3ed17128513163eaedd2843479/src/material/_index.scss#L153-L154

expose the sass function theme-remove just like theme-has.

Use Case

I created a material extensions library https://github.com/ng-matero/extensions and I need the function theme-remove.

[crisbeto]

Can you elaborate on what it would be used for?

[nzbin]

I implement the same mixin all-color and it uses the theme-remove. https://github.com/ng-matero/extensions/blob/main/projects/extensions/core/color/_all-color.scss

If it doesn't expose from the material index.scss, I would have to copy the whole file inspection.scss.

[crisbeto]

Leaving it up to @mmalerba if we should expose this.

[mmalerba]

Yeah I think it makes sense to expose this. I don't think I intended to make it internal, probably just forgot to add it to the forward list

[mmalerba]

Here's a PR to expose it: https://github.com/angular/components/pull/28314

[crisbeto]

Closing as fixed in #28314.

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