remove no digest refs

the digestless special dev behavior is no longer needed

spec/controllers/stylesheets_controller_spec.rb

@@ -7,17 +7,10 @@ describe StylesheetsController do
     StylesheetCache.destroy_all
     builder = Stylesheet::Manager.new('desktop_rtl', nil)
     builder.compile
-    builder.ensure_digestless_file
 
     digest = StylesheetCache.first.digest
     StylesheetCache.destroy_all
 
-    # digestless
-    get :show, name: 'desktop_rtl'
-    expect(response).to be_success
-
-    StylesheetCache.destroy_all
-
     get :show, name: "desktop_rtl_#{digest}"
     expect(response).to be_success
 
@@ -28,9 +21,6 @@ describe StylesheetsController do
     # tmp folder destruction and cached
     `rm #{Stylesheet::Manager.cache_fullpath}/*`
 
-    get :show, name: 'desktop_rtl'
-    expect(response).to be_success
-
     get :show, name: "desktop_rtl_#{digest}"
     expect(response).to be_success