Elements. Migrate RemoveUnusedLocalVariable.

Change-Id: I5062d424e5ce9141148431a859168783525eb724
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/387412
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>

https://dart.googlesource.com/sdk/+/9e663d227cd71f1418320fd78212b0a801cda661

DEPS

diff --git a/DEPS b/DEPS
index bdd8bb4..1d66fbc 100644
--- a/DEPS
+++ b/DEPS
@@ -282,7 +282,7 @@
 
   'engine/src/flutter': Var('flutter_git') + '/mirrors/engine' + '@' + 'f4507e7a4bebeaeacc09bc92ebdc47721429e21b',
 
-  'engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '345bfb9c3dfcb3de9e73fb6e219769edf9ee8e44',
+  'engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '9e663d227cd71f1418320fd78212b0a801cda661',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + 'e3828ec9402204bb81fcdb9c5fb7154367b4a6dd',
 

commits.json

diff --git a/commits.json b/commits.json
index 1cc0427..7c3ff2d 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "engine/src/flutter":"f4507e7a4bebeaeacc09bc92ebdc47721429e21b",
-  "engine/src/flutter/third_party/dart":"345bfb9c3dfcb3de9e73fb6e219769edf9ee8e44",
+  "engine/src/flutter/third_party/dart":"9e663d227cd71f1418320fd78212b0a801cda661",
   "flutter":"e3828ec9402204bb81fcdb9c5fb7154367b4a6dd"
 }
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