Remove pseudo-deprecated methods

Got replaced by a different function.

BUG=457427

Review URL: https://codereview.chromium.org/972253002

Cr-Commit-Position: refs/heads/master@{#318988}

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModel.java

@@ -161,12 +161,6 @@ public interface DocumentTabModel extends TabModel {
      */
     void updateEntry(Intent intent, Tab tab);
 
-    /**
-     * Adds the given Tab to this TabModel.
-     * @param tab Tab to add.
-     */
-    void addTab(Tab tab);
-
     /**
      * Adds the given Tab to this TabModel.
      * @param intent Intent of the DocumentActivity.

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java

@@ -863,13 +863,6 @@ public class DocumentTabModelImpl extends TabModelJniBridge implements DocumentT
         mObservers.clear();
     }
 
-    @Override
-    public void addTab(Tab tab) {
-        int parentIndex = indexOf(tab.getParentId());
-        int index = parentIndex == -1 ? getCount() : parentIndex + 1;
-        addTab(tab, index, tab.getLaunchType());
-    }
-
     @Override
     public void addTab(Intent intent, Tab tab) {
         int parentIndex = indexOf(tab.getParentId());

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/OffTheRecordDocumentTabModel.java

@@ -107,12 +107,6 @@ public class OffTheRecordDocumentTabModel extends OffTheRecordTabModel implement
         return getDelegateDocumentTabModel().getInitialUrlForDocument(tabId);
     }
 
-    @Override
-    public void addTab(Tab tab) {
-        ensureTabModelImpl();
-        getDelegateDocumentTabModel().addTab(tab);
-    }
-
     @Override
     public void addTab(Intent intent, Tab tab) {
         ensureTabModelImpl();