Remove #opaque types

core/odin/ast/ast.odin

@@ -630,11 +630,6 @@ Distinct_Type :: struct {
 	type: ^Expr,
 }
 
-Opaque_Type :: struct {
-	using node: Expr,
-	type: ^Expr,
-}
-
 Poly_Type :: struct {
 	using node: Expr,
 	dollar:         tokenizer.Pos,

core/odin/ast/clone.odin

@@ -243,8 +243,6 @@ clone_node :: proc(node: ^Node) -> ^Node {
 		r.type = clone(r.type);
 	case Distinct_Type:
 		r.type = clone(r.type);
-	case Opaque_Type:
-		r.type = clone(r.type);
 	case Poly_Type:
 		r.type = auto_cast clone(r.type);
 		r.specialization = clone(r.specialization);

core/odin/ast/walk.odin

@@ -339,8 +339,6 @@ walk :: proc(v: ^Visitor, node: ^Node) {
 		walk(v, n.type);
 	case Distinct_Type:
 		walk(v, n.type);
-	case Opaque_Type:
-		walk(v, n.type);
 	case Poly_Type:
 		walk(v, n.type);
 		if n.specialization != nil {