Remove the Frame tool

document-legacy/src/document.rs

@@ -590,6 +590,7 @@ impl Document {
 
 				Some(responses)
 			}
+			// TODO: Remove
 			Operation::AddFrame {
 				path,
 				insert_index,

document-legacy/src/operation.rs

@@ -14,6 +14,7 @@ use std::hash::{Hash, Hasher};
 // TODO: Rename all instances of `path` to `layer_path`
 /// Operations that can be performed to mutate the document.
 pub enum Operation {
+	// TODO: Remove
 	AddFrame {
 		path: Vec<LayerId>,
 		insert_index: isize,