[Libreoffice] Empty functions in chart module

[Julien Nabet]

Hello,

By digging into cppcheck logs, I saw this :
[chart2/source/model/template/BubbleChartType.cxx:69] Technically the 
member function 
'StaticBubbleChartTypeDefaults_Initializer::lcl_AddDefaultsToMap' can be 
const
[chart2/source/model/template/BubbleChartTypeTemplate.cxx:76]: 
Technically the member function 
'StaticBubbleChartTypeTemplateDefaults_Initializer::lcl_AddDefaultsToMap' can 
be const

But these functions are empty.
So :
- should they be removed ?
- should they be "TODO (Must be implemented)" tagged ?
- else ?

Julien.