Disconnect inventory on targeted refresh

When doing a targeted refresh the condition to disconnect the target
from the ems included a check to see if there are any "storages",
this causes problems in some targeted refresh scenarios.
Since it does not seem to make sense this check is being removed.

app/models/ems_refresh/save_inventory_helper.rb

@@ -187,14 +187,14 @@ def determine_deletes_using_association(ems, target, disconnect = true)
   end
 
   def hashes_of_target_empty?(hashes, target)
-    hashes.blank? || (hashes[:storages].blank? &&
+    hashes.blank? ||
     case target
     when VmOrTemplate
       hashes[:vms].blank?
     when Host
       hashes[:hosts].blank?
     when EmsFolder
       hashes[:folders].blank?
-    end)
+    end
   end
 end