[vm] Remove old TODO

TEST=no changes

Change-Id: Ie3fd8be0d419f4db14580cb4e082a2217cdb4190
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/387241
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
Auto-Submit: Daco Harkes <dacoharkes@google.com>

runtime/bin/uri.cc

@@ -10,8 +10,6 @@
 #include "platform/allocation.h"
 #include "platform/utils.h"
 
-// TODO(https://dartbug.com/55925): Move this file to bin/.
-
 namespace dart {
 
 static CStringUniquePtr MakeCopyOfString(const char* str) {