refactor: remove source usages from getInspectorData

Summary:
Changelog: [Internal]

Required for landing D53543159.

3 reasons for landing this:
1. Inspector is technically deprecated and will be removed once React DevTools are shipped with Chrome DevTools for RN debugging.
2. Long-term solution for source fetching is lazy loading based on component stacks - facebook/react#28265
3. Although `source` field is accumulated and stored, it is not displayed anywhere, see InspectorOverlay.js.

Differential Revision: D53757524

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

@@ -38,10 +38,8 @@ type SelectedTab =
   | 'performance-profiling';
 
 export type InspectedElementFrame = TouchedViewDataAtPoint['frame'];
-export type InspectedElementSource = InspectorData['source'];
 export type InspectedElement = $ReadOnly<{
   frame: InspectedElementFrame,
-  source?: InspectedElementSource,
   style?: ViewStyleProp,
 }>;
 export type ElementsHierarchy = InspectorData['hierarchy'];
@@ -74,14 +72,12 @@ function Inspector({
     }
 
     // We pass in findNodeHandle as the method is injected
-    const {measure, props, source} =
-      hierarchyItem.getInspectorData(findNodeHandle);
+    const {measure, props} = hierarchyItem.getInspectorData(findNodeHandle);
 
     measure((x, y, width, height, left, top) => {
       // $FlowFixMe[incompatible-call] `props` from InspectorData are defined as <string, string> dictionary, which is incompatible with ViewStyleProp
       setInspectedElement({
         frame: {left, top, width, height},
-        source,
         style: props.style,
       });
 
@@ -95,7 +91,6 @@ function Inspector({
         hierarchy,
         props,
         selectedIndex,
-        source,
         frame,
         pointerY,
         touchedViewTag,
@@ -120,7 +115,6 @@ function Inspector({
       // $FlowFixMe[incompatible-call] `props` from InspectorData are defined as <string, string> dictionary, which is incompatible with ViewStyleProp
       setInspectedElement({
         frame,
-        source,
         style: props.style,
       });
     };