Simplify the log files by ignoring the "event" channel by default

Author: javiereguiluz

app/config/config_dev.yml

@@ -14,9 +14,10 @@ web_profiler:
 monolog:
     handlers:
         main:
-            type:  stream
-            path:  "%kernel.logs_dir%/%kernel.environment%.log"
+            type: stream
+            path: "%kernel.logs_dir%/%kernel.environment%.log"
             level: debug
+            channels: [!event]
         firephp:
             type:  firephp
             level: info