Do not show wipe version message on build details page for External versions

[saadmk11]

We should not show wipe version message on the build details page for external versions as we disabled wipe version functionality for external versions.

readthedocs.org/readthedocs/core/views/__init__.py

Lines 74 to 79 in 93bcf8d

	def wipe_version(request, project_slug, version_slug):
	version = get_object_or_404(
	Version.internal.all(),
	project__slug=project_slug,
	slug=version_slug,
	)

[ericholscher]

Makes sense. I wonder if this should check something more explicit, like build.supports_wipe that we can just add that logic in one place?

[saadmk11]

Yeah we can do that :)

[saadmk11]

@ericholscher Updated the PR.