Remove unused templates

[mccalluc]

Fix #1993?

@jkmarx : Looking at this, I think each of these files is still referenced... Do you remember what you meant in saying that the imports could be removed?

[jkmarx]

@mccalluc The isa-tab-import.html template and metadata-table-import.html template were replaced by the angular states (data-set-import/state) The import template is still used as it hooks in the the above states.

Where are these templates being references?

[mccalluc]

@jkmarx:

$ git grep isa-tab-import.html
refinery/data_set_manager/views.py:    template_name = 'data_set_manager/isa-tab-import.html'
refinery/ui/source/js/data-set-import/directives/isa-tab-import.js:      return $window.getStaticUrl('partials/data-set-import/partials/isa-tab-import.html');
refinery/ui/source/js/data-set-import/state.js:          return window.getStaticUrl('partials/data-set-import/views/isa-tab-import.html');
refinery/ui/source/js/data-set-import/state.spec.js:      mockTemplate(window.getStaticUrl('partials/data-set-import/views/isa-tab-import.html'));

$ git grep metadata-table-import.html
refinery/data_set_manager/views.py:    template_name = 'data_set_manager/metadata-table-import.html'

Maybe these referencers are themselves unused? Or they should be?

[jkmarx]

$ git grep isa-tab-import.html
The bottom three refer to the angular partial not the template.

Otherwise, I don't believe those views and templates are being used (recommend you confirm). You can check the current import pages views are the angular partials. I believe Fritz updated them a year or so back

[jkmarx]

 checkFilesUrl: '/data_set_manager/import/check_files/',
      isaTabImportUrl: '/data_set_manager/import/isa-tab-form/',
      tabularFileImportUrl: '/data_set_manager/import/metadata-table-form/',
      uploadUrl: '/data_set_manager/import/chunked-upload/',
      uploadCompleteUrl: '/data_set_manager/import/chunked-upload-complete/', 

Endpoints which are being hit by the current data-set-import

View methods are being used by the current data-set-import module.

[hackdna]

refinery/templates/data_set_manager folder should be also removed if it's empty

[mccalluc]

Replaced by #2059