Added the required setup function

cogs/links.py

@@ -84,3 +84,6 @@ class Links:
             else:
                 rand_image = data[random.randint(0, len(data)-1)]['file_url']
             await self.bot.say(rand_image)
+
+def setup(bot):
+    bot.add_cog(Links(bot))

cogs/tags.py

@@ -71,3 +71,6 @@ class Tags:
                     await self.bot.say('I have just removed the tag `{}`'.format(tag))
                 else:
                     await self.bot.say("I was unable to save this data")
+
+def setup(bot):
+    bot.add_cog(Tags(bot))