remove superfluous ev.h include statements

i3-config-wizard/main.c

@@ -21,7 +21,6 @@
 #define _WITH_GETLINE
 #endif
 
-#include <ev.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <stdlib.h>

i3-input/main.c

@@ -8,7 +8,6 @@
  *                  to i3.
  *
  */
-#include <ev.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <stdlib.h>

i3-msg/main.c

@@ -14,7 +14,6 @@
  * Additionally, it’s even useful sometimes :-).
  *
  */
-#include <ev.h>
 #include <stdio.h>
 #include <stdbool.h>
 #include <sys/types.h>

i3-nagbar/main.c

@@ -8,7 +8,6 @@
  * when the user has an error in his configuration file.
  *
  */
-#include <ev.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/wait.h>