remove unnecessary getters

app/components/SimpleEditor/elements/track_change/TrackChangesProvider.js

@@ -418,12 +418,9 @@ class TrackChangesProvider extends TOCProvider {
 
   */
 
-  getCommandManager () {
-    return this.config.commandManager
-  }
-
   getMode () {
-    const trackState = this.getTrackState()
+    const commandStates = this.config.commandManager.getCommandStates()
+    const trackState = commandStates['track-change']
     return trackState.mode
   }
 
@@ -438,12 +435,6 @@ class TrackChangesProvider extends TOCProvider {
 
     return surfaceManager.getSurface(id)
   }
-
-  getTrackState () {
-    const commandManager = this.getCommandManager()
-    const commandStates = commandManager.getCommandStates()
-    return commandStates['track-change']
-  }
 }
 
 TrackChangesProvider.tocTypes = ['track-change']