Don't prefill user email in share link form.

r2/r2/lib/pages/pages.py

@@ -2273,7 +2273,6 @@ class NewLink(Templated):
 class ShareLink(CachedTemplate):
     def __init__(self, link_name = "", emails = None):
         self.captcha = c.user.needs_captcha()
-        self.email = getattr(c.user, 'email', "")
         self.username = c.user.name
         Templated.__init__(self, link_name = link_name,
                            emails = c.user.recent_share_emails())

r2/r2/templates/sharelink.html

@@ -82,8 +82,7 @@
         </th>
         <td>
           <input name="replyto" type="text" size="30"
-                 id="replyto_${thing.link_name}"
-                 value="${thing.email}"/>
+                 id="replyto_${thing.link_name}"/>
         </td>
         <td class="reply-to-errors">
           ${error_field("BAD_EMAILS", "replyto")}