[AST] Remove some pointless uses of hasSingleExpressionBody().

Author: DougGregor

lib/AST/ASTDumper.cpp

@@ -2496,11 +2496,7 @@ class PrintExpr : public ExprVisitor<PrintExpr> {
     }
 
     OS << '\n';
-    if (E->hasSingleExpressionBody()) {
-      printRec(E->getSingleExpressionBody());
-    } else {
-      printRec(E->getBody(), E->getASTContext());
-    }
+    printRec(E->getBody(), E->getASTContext());
     PrintWithColorRAII(OS, ParenthesisColor) << ')';
   }
   void visitAutoClosureExpr(AutoClosureExpr *E) {

lib/AST/Expr.cpp

@@ -2365,11 +2365,7 @@ void swift::simple_display(llvm::raw_ostream &out, const ClosureExpr *CE) {
     return;
   }
 
-  if (CE->hasSingleExpressionBody()) {
-    out << "single expression closure";
-  } else {
-    out << "closure";
-  }
+  out << "closure";
 }
 
 void swift::simple_display(llvm::raw_ostream &out,