Address results of PVS-Studio static analysis

Couple are left un-addressed, see #958 for details.

include/internal/catch_message.cpp

@@ -48,9 +48,6 @@ namespace Catch {
         m_info.message = builder.m_stream.str();
         getResultCapture().pushScopedMessage( m_info );
     }
-    ScopedMessage::ScopedMessage( ScopedMessage const& other )
-    : m_info( other.m_info )
-    {}
 
     ScopedMessage::~ScopedMessage() {
         if ( !std::uncaught_exception() ){