libedit: fix crash on Delete Component with no selection

This bug was actually here before the new component chooser this time;
I'm not sure what the purpose of this error message was since it is
being displayed in a non-error state. Maybe a copy/paste bug from when
Delete Component was changed to use the main component chooser?

eeschema/libedit.cpp

@@ -549,10 +549,6 @@ void LIB_EDIT_FRAME::DeleteOnePart( wxCommandEvent& event )
 
     if( !libEntry )
     {
-        msg.Printf( _( "Entry '%s' not found in library '%s'." ),
-                    GetChars( libEntry->GetName() ),
-                    GetChars( lib->GetName() ) );
-        DisplayError( this, msg );
         return;
     }