Switch to side-by-side view

--- a/src/index/subtreelist.cpp
+++ b/src/index/subtreelist.cpp
@@ -63,7 +63,6 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <errno.h>
 #include <string.h>