cleanup[Inspector]: remove unused code (#41292)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/41292

Changelog: [Internal]

Seems to be unused

Reviewed By: javache

Differential Revision: D50559548

fbshipit-source-id: 4bf7c27cb75e567c43adfa5aa4c120c67ef4dd5e

packages/react-native/Libraries/Inspector/Inspector.js

@@ -57,8 +57,6 @@ class Inspector extends React.Component<
     ...
   },
 > {
-  _hideTimeoutID: TimeoutID | null = null;
-  _subs: ?Array<() => void>;
   _setTouchedViewData: ?(TouchedViewDataAtPoint) => void;
 
   constructor(props: Props) {
@@ -77,10 +75,6 @@ class Inspector extends React.Component<
   }
 
   componentWillUnmount() {
-    if (this._subs) {
-      this._subs.map(fn => fn());
-    }
-
     this._setTouchedViewData = null;
   }