Remove unnecessary 'extern's.

Change-Id: Iba2b3fb6ff88e504f1657b915120ae43d58a1e03
diff --git a/libc/include/sys/inotify.h b/libc/include/sys/inotify.h
index dcf0e1d..2e99144 100644
--- a/libc/include/sys/inotify.h
+++ b/libc/include/sys/inotify.h
@@ -40,10 +40,10 @@
 #define IN_CLOEXEC O_CLOEXEC
 #define IN_NONBLOCK O_NONBLOCK
 
-extern int inotify_init(void);
-extern int inotify_init1(int) __INTRODUCED_IN(21);
-extern int inotify_add_watch(int, const char*, uint32_t);
-extern int inotify_rm_watch(int, uint32_t);
+int inotify_init(void);
+int inotify_init1(int) __INTRODUCED_IN(21);
+int inotify_add_watch(int, const char*, uint32_t);
+int inotify_rm_watch(int, uint32_t);
 
 __END_DECLS