Remove deprecated trends_current().

Also adding IRC notifications for CI build failures.

.travis.yml

@@ -10,4 +10,10 @@ env:
   CONSUMER_SECRET="SpKzSXf16fEQ3AZtiRy8PkGOOgTSmL3Cdmh7o0D8"
   ACCESS_KEY="82301637-v1wF1jWd7oa2ZFsIDUNlPKSpTdJ6f8dIMz1Zwmy58"
   ACCESS_SECRET="21oUZmKWYuv7PZTcj13UFpPlmh7HD6glR8yayrOgg8"
+notifications:
+  irc:
+    channels:
+      - "irc.freenode.net#tweepy"
+    on_success: change
+    on_failure: always
 

tests.py

@@ -272,7 +272,6 @@ class TweepyAPITests(unittest.TestCase):
         self.api.search('tweepy')
 
     def testtrends(self):
-        self.api.trends_current()
         self.api.trends_daily()
         self.api.trends_weekly()
 

tweepy/api.py

@@ -677,13 +677,6 @@ class API(object):
     )
     search.pagination_mode = 'page'
 
-    """ trends/current """
-    trends_current = bind_api(
-        path = '/trends/current.json',
-        payload_type = 'json',
-        allowed_param = ['exclude']
-    )
-
     """ trends/daily """
     trends_daily = bind_api(
         path = '/trends/daily.json',