Hide custom submission form edit (#803)

app/views/assessments/_edit_basic.html.erb

@@ -55,15 +55,15 @@
     }
 </script>
 
-
+<!--
 <h4>Additional Submission Form</h4>
 <div class="form-group">
     <span class="" onclick="validate();"><%= f.check_box :has_custom_form, class: "",
     display_name: "Use custom submission form?",
     help_text: "Whether to require a custom form while submitting files for this assignment. Please note that changing the form after submissions have begun may result in unexpected errors." %></span>
 <div id = "moreOptions" style="display:none"><%= f.text_field :languages, :size => 75, help_text: "Multiple Language Support: Programming Languages that the assessment can be submitted in (separated by comma)" %><%= f.text_field :textfields, :size => 75, help_text: "Any additional textfields (upto 3) that need to be filled in at the time of submission (separated by comma)" %></div>
 </div>
-
+-->
 <h4>Modules Used</h4>
 <ul class="collection attachments">
   <li class="collection-item">