Fix lint error

Author: rbuckton

src/compiler/checker.ts

@@ -25536,7 +25536,7 @@ namespace ts {
                         const property = getPropertyOfType(parentType, nameText);
                         if (property) {
                             markPropertyAsReferenced(property, /*nodeForCheckWriteOnly*/ undefined, /*isThisAccess*/ false); // A destructuring is never a write-only reference.
-                            checkPropertyAccessibility(parent, !!parent.initializer && parent.initializer.kind === SyntaxKind.SuperKeyword, parentType!, property);
+                            checkPropertyAccessibility(parent, !!parent.initializer && parent.initializer.kind === SyntaxKind.SuperKeyword, parentType, property);
                         }
                     }
                 }