Ensure consistent naming between documentation and code, also removed unnecessary function

cypress/integration/rendering/classDiagram-v2.spec.js

@@ -500,12 +500,12 @@ class Class10
   C1 -->  C2`
     );
   });
-  it('should render a class with a text label, members and annotation', () => {
+  it('should render a class with a text label, attribute and annotation', () => {
     imgSnapshotTest(
       `classDiagram
   class C1["Class 1 with text label"] {
     <<interface>>
-    +member1
+    +attribute1
   }
   C1 -->  C2`
     );