[FIX] project: remove redundant context declaration

Declaring the keyword argument `context` in an API v7 `orm.browse_record` can
lead to mixed API v7/v8 inheritance bugs (`context` will be treated as a
function parameter instead of being injected in `self.env.context`). As the
context is already propagated in line 953, we can safely remove it from line
971.

Closes #13115

addons/project/project.py

@@ -968,7 +968,7 @@ class task(osv.osv):
                 'remaining_hours': delegate_data['planned_hours_me'],
                 'planned_hours': delegate_data['planned_hours_me'] + (task.effective_hours or 0.0),
                 'name': newname,
-            }, context=context)
+            })
             delegated_tasks[task.id] = delegated_task_id
         return delegated_tasks