[core] remove include base.h where unused

src/log.c

@@ -5,7 +5,6 @@
 
 #include "first.h"
 
-#include "base.h"
 #include "log.h"
 
 #include <sys/types.h>

src/rand.c

@@ -1,7 +1,6 @@
 #include "first.h"
 
 #include "rand.h"
-#include "base.h"
 #include "fdevent.h"
 #include "safe_memclear.h"
 

src/sock_addr.c

@@ -11,7 +11,6 @@
 #include <arpa/inet.h>
 #endif
 
-#include "base.h"
 #include "log.h"