Remove unsused method in Config

src/core/config.cpp

@@ -44,11 +44,6 @@ Config::Config()
     }
 }
 
-void Config::setConfig(const Config &config)
-{
-    *sConfig = config;
-}
-
 const Config &Config::get()
 {
     return *sConfig;

src/core/config_p.h

@@ -34,10 +34,6 @@ public:
      * Configures behavior of the payload compression feature.
      */
     PayloadCompression payloadCompression = {};
-
-
-protected:
-    static void setConfig(const Config &config);
 };
 
 } // namespace Akonadi