Removed dbx_branding flag and Dropbox corner logo

(imported from commit d205898671643985e2de7c0d6d300bdca32cae21)

templates/zerver/navbar.html

@@ -1,7 +1,7 @@
 <div class="header">
 <div class="header-main rightside-userlist" id="top_navbar">
   <div class="column-left">
-    <a class="brand logo" href="#"><img src="/static/images/logo/{% if dbx_branding %}dbx{% else %}zulip{% endif %}cornerlogo@2x.png" class="logoimage" alt="{{product_name}}" content="{{product_name}}" /></a>
+    <a class="brand logo" href="#"><img src="/static/images/logo/zulipcornerlogo@2x.png" class="logoimage" alt="{{product_name}}" content="{{product_name}}" /></a>
   </div>
   <div class="column-middle" id="navbar-middle">
     <div class="column-middle-inner">

zerver/views/__init__.py

@@ -1058,12 +1058,7 @@ def home(request):
     if page_params['domain'] == "zulip.com" and settings.ZULIP_COM_STAGING:
         send_to_prod = True
 
-    dbx_branding = False
     product_name = "Zulip"
-    if page_params['domain'] == "zulip.com":
-        dbx_branding = True
-        product_name = "Dropbox Chat"
-
     page_params['product_name'] = product_name
     request._log_data['extra'] = "[%s]" % (register_ret["queue_id"],)
     response = render_to_response('zerver/index.html',
@@ -1079,7 +1074,6 @@ def home(request):
                                    'enable_feedback': settings.ENABLE_FEEDBACK,
                                    'embedded': narrow_stream is not None,
                                    'send_to_prod': send_to_prod,
-                                   'dbx_branding': dbx_branding,
                                    'product_name': product_name
                                    },
                                   context_instance=RequestContext(request))