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 {

core/odin/parser/parser.odin

@@ -2101,12 +2101,6 @@ parse_operand :: proc(p: ^Parser, lhs: bool) -> ^ast.Expr {
 		tok := expect_token(p, .Hash);
 		name := expect_token(p, .Ident);
 		switch name.text {
-		case "opaque":
-			type := parse_type(p);
-			ot := ast.new(ast.Opaque_Type, tok.pos, type.end);
-			ot.type = type;
-			return ot;
-
 		case "type":
 			type := parse_type(p);
 			hp := ast.new(ast.Helper_Type, tok.pos, type.end);