Unused static method on class declared inside a function is not removed

[WearyMonkey]

Input:

function zaa() {
  class Foo {
    static fee() { console.log('fee') }
    static baa() { console.log('baa') }
  }
  Foo.baa()
};
zaa();

Output:

(function() {
  function a() {
  }
  a.b = function() {
    console.log("fee");
  };
  a.a = function() {
    console.log("baa");
  };
  a.a();
})();

Expected the unused fee method to be removed.

Compare to global scope declaration, input:

class Foo {
  static fee() { console.log('fee') }
  static baa() { console.log('baa') }
}
Foo.baa();

output:

console.log("baa");

Object literal, input:

function zaa() {
  const Foo = {
  	fee() { console.log('fee') },
    baa() { console.log('baa') }
  }
  Foo.baa()
  
};
zaa();

output:

console.log("baa");

Prototype methods, input:

function zaa() {
  class Foo {
  	fee() { console.log('fee') }
    baa() { console.log('baa') }
  }
  new Foo().baa()
  
};
zaa();

output:

(function() {
  function a() {
  }
  a.prototype.a = function() {
    console.log("baa");
  };
  (new a).a();
})();