Simply error logic, remove show_url check

Author: SnoopJ

sopel/modules/wikipedia.py

@@ -188,12 +188,11 @@ def say_snippet(bot, trigger, server, query, show_url=True, commanded=False):
         # see https://github.com/sopel-irc/sopel/issues/2259
         snippet = re.sub(r"\s+", " ", snippet)
     except KeyError:
-        if show_url:
-            msg = 'Error fetching snippet for "{}".'.format(page_name)
-            if commanded:
-                bot.reply(msg)
-            else:
-                bot.say(msg)
+        msg = 'Error fetching snippet for "{}".'.format(page_name)
+        if commanded:
+            bot.reply(msg)
+        else:
+            bot.say(msg)
         return
 
     msg = '{} | "{}'.format(page_name, snippet)