diff --git a/plugins/tasks/tasks-api/src/com/intellij/tasks/TaskManager.java b/plugins/tasks/tasks-api/src/com/intellij/tasks/TaskManager.java
index 1df0d52a742d..fe462d6b8917 100644
--- a/plugins/tasks/tasks-api/src/com/intellij/tasks/TaskManager.java
+++ b/plugins/tasks/tasks-api/src/com/intellij/tasks/TaskManager.java
@@ -81,9 +81,6 @@ public abstract class TaskManager {
 
   public abstract List<Task> getCachedIssues(final boolean withClosed);
 
-  @Nullable
-  public abstract Task updateIssue(@NotNull String id);
-
   public abstract List<LocalTask> getLocalTasks();
 
   public abstract List<LocalTask> getLocalTasks(final boolean withClosed);
@@ -118,8 +115,6 @@ public abstract class TaskManager {
 
   public abstract void trackContext(LocalChangeList changeList);
 
-  public abstract void disassociateFromTask(LocalChangeList changeList);
-
   public abstract void removeTask(LocalTask task);
 
   @Deprecated // use {@code com.intellij.tasks.TaskManager.addTaskListener(com.intellij.tasks.TaskListener, com.intellij.openapi.Disposable)}
diff --git a/plugins/tasks/tasks-core/src/com/intellij/tasks/impl/TaskManagerImpl.java b/plugins/tasks/tasks-core/src/com/intellij/tasks/impl/TaskManagerImpl.java
index 39d36dcf66cb..b9b4808f1a70 100644
--- a/plugins/tasks/tasks-core/src/com/intellij/tasks/impl/TaskManagerImpl.java
+++ b/plugins/tasks/tasks-core/src/com/intellij/tasks/impl/TaskManagerImpl.java
@@ -267,9 +267,7 @@ public class TaskManagerImpl extends TaskManager implements ProjectComponent, Pe
     return ContainerUtil.filter(myIssueCache.values(), task -> withClosed || !task.isClosed());
   }
 
-  @Nullable
-  @Override
-  public Task updateIssue(@NotNull String id) {
+  private void updateIssue(@NotNull String id) {
     for (TaskRepository repository : getAllRepositories()) {
       if (repository.extractId(id) == null) {
         continue;
@@ -281,16 +279,15 @@ public class TaskManagerImpl extends TaskManager implements ProjectComponent, Pe
           LocalTask localTask = findTask(id);
           if (localTask != null) {
             localTask.updateFromIssue(issue);
-            return localTask;
+            return;
           }
-          return issue;
+          return;
         }
       }
       catch (Exception e) {
         LOG.info(e);
       }
     }
-    return null;
   }
 
   @Override
@@ -907,16 +904,6 @@ public class TaskManagerImpl extends TaskManager implements ProjectComponent, Pe
     }
   }
 
-  @Override
-  public void disassociateFromTask(@NotNull LocalChangeList changeList) {
-    ChangeListInfo changeListInfo = new ChangeListInfo(changeList);
-    for (LocalTask localTask : getLocalTasks()) {
-      if (localTask.getChangeLists().contains(changeListInfo)) {
-        localTask.removeChangelist(changeListInfo);
-      }
-    }
-  }
-
   public void decorateChangeList(@NotNull LocalChangeList changeList,
                                  @NotNull ColoredTreeCellRenderer cellRenderer,
                                  boolean selected,