Merge pull request #2536 from usethesource/cleanup-atree

removed unused definition of ATree to avoid confusion

Author: PaulKlint

src/org/rascalmpl/compiler/lang/rascalcore/check/ATypeBase.rsc

@@ -156,25 +156,12 @@ public AProduction achoice(AType s, set[AProduction] achoices){
    fail;
 }
 
-// ---- Parse Tree
 
-data ATree
-     = appl(AProduction aprod, list[ATree] args/*, loc src=|unknown:///|*/) // <1>
-     | cycle(AType atype, int cycleLength)  // <2>
-     | aamb(set[ATree] alternatives) // <3>
-     | achar(int character) // <4>
-     ;
 
 public /*const*/ AType treeType = aadt("Tree", [], dataSyntax());
 
 public bool isTreeType(AType t) = treeType := t;
 
-//@doc{
-//.Synopsis
-//Annotate a parse tree node with a source location.
-//}
-//anno loc Tree@\loc; // TODO: weg
-
 data SyntaxRole
     = dataSyntax()
     | contextFreeSyntax()