tools: remove unnecessary includes

After the split of virsh to multiple files, and the subsequent
split to vsh/virt-admin, there are quite a few leftovers.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>

tools/virsh-snapshot.h

@@ -20,6 +20,6 @@
 
 #pragma once
 
-#include "virsh.h"
+#include "vsh.h"
 
 extern const vshCmdDef snapshotCmds[];