migration: remove unnecessary zlib dependency

zlib code is only used by the emulators, not by the tests.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

meson.build

@@ -3696,7 +3696,7 @@ libmigration = static_library('migration', sources: migration_files + genh,
                               name_suffix: 'fa',
                               build_by_default: false)
 migration = declare_dependency(link_with: libmigration,
-                               dependencies: [zlib, qom, io])
+                               dependencies: [qom, io])
 system_ss.add(migration)
 
 block_ss = block_ss.apply({})

migration/dirtyrate.c

@@ -12,7 +12,6 @@
 
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
-#include <zlib.h>
 #include "hw/core/cpu.h"
 #include "qapi/error.h"
 #include "exec/ramblock.h"

migration/meson.build

@@ -29,7 +29,7 @@ system_ss.add(files(
   'socket.c',
   'tls.c',
   'threadinfo.c',
-), gnutls)
+), gnutls, zlib)
 
 if get_option('replication').allowed()
   system_ss.add(files('colo-failover.c', 'colo.c'))

migration/qemu-file.c

@@ -22,7 +22,6 @@
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
-#include <zlib.h>
 #include "qemu/madvise.h"
 #include "qemu/error-report.h"
 #include "qemu/iov.h"