Remove include of unistd.h. non-existant on win32

applications/jpip/libopenjpip/byte_manager.c

@@ -30,7 +30,6 @@
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <unistd.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 #include "byte_manager.h"

applications/jpip/libopenjpip/dec_clientmsg_handler.c

@@ -31,7 +31,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 #include "dec_clientmsg_handler.h"
 #include "ihdrbox_manager.h"
 #include "jpipstream_manager.h"

applications/jpip/libopenjpip/openjpip.c

@@ -46,7 +46,6 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
-#include <unistd.h>
 #include "jp2k_encoder.h"
 
 #ifdef SERVER

applications/jpip/libopenjpip/sock_manager.c

@@ -39,7 +39,6 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include "sock_manager.h"
 
 #ifdef SERVER

applications/jpip/libopenjpip/target_manager.c

@@ -33,7 +33,6 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 #include <fcntl.h>
 #include <time.h>
 #include "target_manager.h"