[cleanup] Remove redundant removeObject call, this is already called on child-detached

[vincentfretin]

Remove redundant removeObject call that removes helpers, this is already called on child-detached event.
This was called a second time when removeChild was called because of the listener here

aframe-inspector/src/index.js

Lines 201 to 204 in 05d895e

	document.addEventListener('child-detached', (event) => {
	var entity = event.detail.el;
	AFRAME.INSPECTOR.removeObject(entity.object3D);
	});

[dmarcos]

Thank you!