[buddy] remove useless #include<assert.h>

* src/bddio.c, src/bddop.c, src/imatrix.c, src/pairs.c: Here.

buddy/src/bddio.c

@@ -37,7 +37,6 @@
 #include <string.h>
 #include <stdlib.h>
 #include <fcntl.h>
-#include <assert.h>
 #include <sys/stat.h>
 #include "kernel.h"
 

buddy/src/bddop.c

@@ -38,7 +38,6 @@
 #include <string.h>
 #include <math.h>
 #include <time.h>
-#include <assert.h>
 
 #include "kernel.h"
 #include "cache.h"

buddy/src/imatrix.c

@@ -34,7 +34,6 @@
   DATE:  (C) february 2000
 *************************************************************************/
 #include <stdlib.h>
-#include <assert.h>
 #include <string.h>
 #include "kernel.h"
 #include "imatrix.h"

buddy/src/pairs.c

@@ -36,7 +36,6 @@
 *************************************************************************/
 #include <stdlib.h>
 #include <limits.h>
-#include <assert.h>
 #include "kernel.h"
 
 /*======================================================================*/