Remove edX references in signup modal

This is an unused view (I think) ever since the Drupal change, but
ensure that it's Stanfordized anyway.

lms/templates/signup_modal.html

@@ -9,7 +9,7 @@
   <div class="inner-wrapper">
     <div id="register">
       <header>
-        <h2>Sign Up for <span class="edx">edX</span></h2>
+        <h2>Sign Up</h2>
         <hr>
       </header>
 
@@ -81,7 +81,7 @@
           <label data-field="mailing_address" for="signup_mailing_address">Mailing address</label>
 	    <textarea id="signup_mailing_address" name="mailing_address"></textarea>
 	  
-          <label data-field="goals" for="signup_goals">Goals in signing up for edX</label>
+          <label data-field="goals" for="signup_goals">Learning goals</label>
 	    <textarea name="goals" id="signup_goals"></textarea>
 
         </div>
@@ -96,7 +96,7 @@
           <label data-field="honor_code" class="honor-code" for="signup_honor">
             <input id="signup_honor" name="honor_code" type="checkbox" value="true">
             I agree to the
-            <a href="${reverse('honor')}" target="_blank">Honor Code</a>*
+            <a href="${reverse('tos')}#honor" target="_blank">Honor Code</a>*
           </label>
         </div>