Removed confusing comments (#2076) (#2179)

CppCoreGuidelines.md

@@ -4151,8 +4151,6 @@ It's confusing. Writing `[=]` in a member function appears to capture by value,
             // ...
 
             auto lambda = [=] { use(i, x); };   // BAD: "looks like" copy/value capture
-            // [&] has identical semantics and copies the this pointer under the current rules
-            // [=,this] and [&,this] are not much better, and confusing
 
             x = 42;
             lambda(); // calls use(0, 42);