Remove unused vector.h in library/cpp/http/io/headers.h

3a95ba7ea18b67eb6bd8d04631814456f4881138

library/cpp/http/io/headers.h

@@ -4,7 +4,6 @@
 #include <util/generic/deque.h>
 #include <util/generic/string.h>
 #include <util/generic/strbuf.h>
-#include <util/generic/vector.h>  // XXX unused - remove after fixing transitive includes.
 #include <util/string/cast.h>
 
 class IInputStream;