remove stdbool.h where it's not needed
diff --git a/lib/blame.c b/lib/blame.c
index 5cfa91f..18552fa 100644
--- a/lib/blame.c
+++ b/lib/blame.c
@@ -21,7 +21,6 @@
#include <sha1.h>
#include <string.h>
-#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
diff --git a/lib/diff.c b/lib/diff.c
index ea5a062..1b319f3 100644
--- a/lib/diff.c
+++ b/lib/diff.c
@@ -17,7 +17,6 @@
#include <sys/queue.h>
#include <sys/stat.h>
-#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>