Sharing: Remove CAPTCHA for email share

We're no longer requiring a CAPTCHA for the email share feature.
Sharing by email/username requires login and is also rate limited.

r2/r2/controllers/api.py

@@ -1906,7 +1906,6 @@ class ApiController(RedditController):
     @validatedForm(
         VUser(),
         VModhash(),
-        VCaptcha(),
         VRatelimitImproved(prefix='share', max_usage=g.RL_SHARE_MAX_REQS,
                            rate_user=True, rate_ip=True),
         share_from=VLength('share_from', max_length=100),
@@ -1944,9 +1943,6 @@ class ApiController(RedditController):
                                   errors.TOO_MANY_EMAILS):
             shareform.find(".share-to-errors").children().hide()
             return
-        # lastly, check the captcha.
-        elif shareform.has_errors("captcha", errors.BAD_CAPTCHA):
-            return
         elif shareform.has_errors("ratelimit", errors.RATELIMIT):
             return
 

r2/r2/lib/pages/pages.py

@@ -3287,7 +3287,6 @@ class NewLink(Templated):
 
 class ShareLink(CachedTemplate):
     def __init__(self, link_name = "", emails = None):
-        self.captcha = c.user.needs_captcha()
         self.username = c.user.name
         Templated.__init__(self, link_name=link_name)
 

r2/r2/templates/sharelink.html

@@ -21,7 +21,6 @@
 ###############################################################################
 
 <%namespace file="utils.html" import="error_field"/>
-<%namespace file="captcha.html" import="captchagen"/>
 
 <form onsubmit="return post_form(this, 'share')" method="post"
       id="sharelink_${thing.link_name}"
@@ -106,9 +105,6 @@
           ${error_field("TOO_LONG", "message")}
         </td>
       </tr>
-      %if thing.captcha:
-        ${captchagen('', tabulate = False, size = 30)}
-      %endif
       <tr>
         <td>
         </td>