C++: Uncomment @function.kind in the dbscheme

Author: jketema

cpp/ql/lib/semmlecode.cpp.dbscheme

@@ -286,7 +286,6 @@ macro_argument_expanded(
     string text: string ref
 );
 
-/*
 case @function.kind of
   1 = @normal_function
 | 2 = @constructor
@@ -297,7 +296,6 @@ case @function.kind of
 | 7 = @user_defined_literal
 | 8 = @deduction_guide
 ;
-*/
 
 functions(
     unique int id: @function,