Remove persist from background

Author: j-mccoll

src/extension/background.js

@@ -42,9 +42,8 @@ function createTabObj(title) {
       reactDevToolsInstalled: false,
       targetPageisaReactApp: false,
     },
-    // Note: Persist is a now defunct feature. Paused = Locked
+    // Note: Paused = Locked
     mode: {
-      persist: false,
       paused: false,
     },
     // stores web metrics calculated by the content script file
@@ -204,10 +203,6 @@ chrome.runtime.onConnect.addListener((port) => {
       case 'setPause':
         tabsObj[tabId].mode.paused = payload;
         return true;
-      // persist is now depreacted
-      case 'setPersist':
-        tabsObj[tabId].mode.persist = payload;
-        return true;
       case 'launchContentScript':
         chrome.scripting.executeScript({
           target: { tabId },