remove deprecated code

remove code already flagged as [[deprecated]] for quite some time...

must be applied after (or at the same time as) Phys!776 (merged)

Det/DetDesc/DetDesc/SolidBoolean.h

@@ -160,24 +160,6 @@ public:
     return index < c.size() ? &c[index] : nullptr;
   }
 
-  /** acess to constant iterator
-   *  @return "begin" iterator
-   */
-  [[deprecated( "please use begin(children()) instead" )]] //
-  SolidChildrens::const_iterator
-  childBegin() const {
-    return m_sb_childrens.begin();
-  }
-
-  /** acess to constant iterator
-   *  @return "end" iterator
-   */
-  [[deprecated( "please use end(children()) instead" )]] //
-  SolidChildrens::const_iterator
-  childEnd() const {
-    return m_sb_childrens.end();
-  }
-
   ///
 
   /** constructor - "main"("first") solid is mandatory!