Remove unnecessary fields from test.

Author: cmtice

lldb/test/API/commands/target/anon-struct/main.cpp

@@ -2,15 +2,13 @@ struct A {
   struct {
     int x = 1;
   };
-  int y = 2;
 } a;
 
 struct B {
   // Anonymous struct inherits another struct.
   struct : public A {
     int z = 3;
   };
-  int w = 4;
   A a;
 } b;