remove mutex locks

Everything is still in order though, this is because
everyone is following orders:

Before party:
FOOD:  [ *********** ]
TRASH: [             ]

After party:
FOOD:  [             ]
TRASH: [ *********** ]

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
diff --git a/main.c b/main.c
index f1fd83c..2965ec7 100644
--- a/main.c
+++ b/main.c
@@ -53,14 +53,12 @@
 {
 	long tid = (long)t;
 
-	pthread_mutex_lock(&party->mutex);
 	eat(tid);
 
 	if (tid % 2 == 1)
 		sleep(1);
 
 	cleanup(tid);
-	pthread_mutex_unlock(&party->mutex);
 
 	pthread_exit(NULL);
 }