diff --git a/src/util/warning.h b/src/util/warning.h
index 629c357fa..2bcc7512b 100644
--- a/src/util/warning.h
+++ b/src/util/warning.h
@@ -33,26 +33,5 @@ void warning_msg(const char * msg, ...);
 
 void format2ostream(std::ostream& out, char const* fmt, va_list args);
 
-class warning_displayer {
-    const char * m_msg;
-    bool         m_displayed;
-public:
-    warning_displayer(const char * msg):
-        m_msg(msg),
-        m_displayed(false) {
-    }
-
-    void sign() {
-        if (!m_displayed) {
-            warning_msg(m_msg);
-            m_displayed = true;
-        }
-    }
-
-    void reset() {
-        m_displayed = false;
-    }
-};
-
 #endif /* WARNING_H_ */