fix: lint error

Author: Jack-Works

src/compiler/checker.ts

@@ -1062,11 +1062,8 @@ namespace ts {
         function errorByThrowType(location: Node | undefined, type: Type) {
             if (type.flags & TypeFlags.ThrowType) type = (<ThrowType>type).value;
             let message = "";
-            if (type.flags & TypeFlags.StringLiteral) {
-                message = (<StringLiteralType>type).value;
-            } else {
-                message = getTypeNameForErrorDisplay(type)
-            };
+            if (type.flags & TypeFlags.StringLiteral) message = (<StringLiteralType>type).value;
+            else message = getTypeNameForErrorDisplay(type);
             error(location, Diagnostics.Type_instantiated_results_in_a_throw_type_saying_Colon_0, message);
         }