Refactor skills framework

Follow-up MRs:

• robot-skill-templates!48 (merged)
• armarx-simulation!66 (merged)
• sw/armarx/skills/control!37 (merged)
• sw/armarx/skills/kinesthetic-learning!2 (merged)
• sw/armarx/skills/localization-and-mapping!3 (merged)
• sw/armarx/skills/manipulation!33 (merged)
• sw/armarx-integration/robots/armar7/skills!8
• ... --> see comment

source/RobotAPI/libraries/skills/provider/SkillProviderComponentPlugin.h

@@ -165,25 +165,6 @@ namespace armarx
         getSkillProviderPlugin() const;
 
     protected:
-        // -----------------------------------------------------------------------------------------
-        // LEGACY, TODO: NEEDS TESTING
-        // -----------------------------------------------------------------------------------------
-        template <class SkillT>
-
-        requires skills::isSkill<SkillT> skills::SkillBlueprint*
-        addSkill(std::unique_ptr<SkillT>&& s)
-        {
-            return addSkillFactory<SkillT>();
-        }
-
-        template <class SkillT, typename... Args>
-
-        requires skills::isSkill<SkillT> skills::SkillBlueprint*
-        addSkill(Args&&... args)
-        {
-            return addSkillFactory<SkillT>(std::forward<Args>(args)...);
-        }
-
         // -----------------------------------------------------------------------------------------
         // New
         // -----------------------------------------------------------------------------------------