refactor/eg: already documented; remove TODO

Change-Id: I7166006a3a922505a5f0a619bd98c0a1505831bc
Reviewed-on: https://go-review.googlesource.com/48981
Reviewed-by: Leo Rudberg <ljr@google.com>
Reviewed-by: Ross Light <light@google.com>
Run-TryBot: Ross Light <light@google.com>
diff --git a/refactor/eg/eg.go b/refactor/eg/eg.go
index 2e843b5..bf0ee29 100644
--- a/refactor/eg/eg.go
+++ b/refactor/eg/eg.go
@@ -179,7 +179,6 @@
 			// Dot imports are currently forbidden.  We
 			// make the simplifying assumption that all
 			// imports are regular, without local renames.
-			// TODO(adonovan): document
 			return nil, fmt.Errorf("dot-import (of %s) in template", imp.Path.Value)
 		}
 	}