Remove helper function from LogBackend

Change-Id: I634411296c7e44c044c9b3c148e5b257c467e79b
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/aos/events/logging/log_backend.h b/aos/events/logging/log_backend.h
index 3a47f42..91f048c 100644
--- a/aos/events/logging/log_backend.h
+++ b/aos/events/logging/log_backend.h
@@ -269,10 +269,6 @@
   // in memory. id is usually generated by log namer and looks like name of the
   // file within a log folder.
   virtual std::unique_ptr<LogSink> RequestFile(const std::string_view id) = 0;
-
-  std::unique_ptr<LogSink> RequestFile(const LogSource::File &id) {
-    return RequestFile(id.name);
-  }
 };
 
 // Implements requests log files from file system.