[Hera] Excise a bunch of document mode code

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index 1b2d03e6a86d2f0f266941a0d1cc315538e6b864..22111fafcdf77c77212330845e2aa9b60705f894 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -56,7 +56,6 @@ import org.chromium.chrome.browser.customtabs.CustomTabActivity;
 import org.chromium.chrome.browser.customtabs.CustomTabIntentDataProvider;
 import org.chromium.chrome.browser.device.DeviceClassManager;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
-import org.chromium.chrome.browser.document.DocumentUma;
 import org.chromium.chrome.browser.firstrun.FirstRunActivity;
 import org.chromium.chrome.browser.firstrun.FirstRunFlowSequencer;
 import org.chromium.chrome.browser.firstrun.FirstRunSignInProcessor;
@@ -378,10 +377,6 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
         if (getActivityTab() == null) mLayoutManager.showOverview(false);
 
         resetSavedInstanceState();
-
-        if (FeatureUtilities.isDocumentModeEligible(this)) {
-            DocumentUma.recordInDocumentMode(false);
-        }
     }
 
     @Override