osdc: remove unused rados.h include from error_code.h

Remove unnecessary `#include "include/rados.h"` from error_code.h as it's not
used by the header and error_code.h doesn't need to expose any RADOS
declarations.

This improves compilation time and reduces unnecessary dependencies.

Signed-off-by: Kefu Chai <[email protected]>

Author: tchaikov

src/osdc/error_code.h

@@ -17,8 +17,6 @@
 
 #include <boost/system/error_code.hpp>
 
-#include "include/rados.h"
-
 const boost::system::error_category& osdc_category() noexcept;
 
 enum class osdc_errc {