remove unused regex.h includes

The code using regexes got moved, but the include stayed.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

src/libxl/libxl_driver.c

@@ -27,7 +27,6 @@
 #include <libxl_utils.h>
 #include <xenstore.h>
 #include <fcntl.h>
-#include <regex.h>
 
 #include "internal.h"
 #include "virlog.h"

src/storage/storage_util.c

@@ -18,7 +18,6 @@
 
 #include <config.h>
 
-#include <regex.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>

src/util/viriscsi.c

@@ -22,8 +22,6 @@
 
 #include <config.h>
 
-#include <regex.h>
-
 #include "viriscsi.h"
 
 #include "viralloc.h"

src/util/virnetdevtap.c

@@ -32,7 +32,6 @@
 #include "datatypes.h"
 
 #include <unistd.h>
-#include <regex.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <net/if.h>

tests/testutils.c

@@ -25,7 +25,6 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
-#include <regex.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include "testutils.h"