[co19] Roll co19_2 to 56f45529ff2818e8549d6e092fc478e73d68fcc0

2022-12-09 [email protected] dart-lang/co19#1575. Remove unused code (dart-lang/co19#1579)
2022-12-08 [email protected] dart-lang/co19#1575. Update test expectations for analyzer (dart-lang/co19#1577)
2022-12-06 [email protected] Fixes dart-lang/co19#959. Fix flaky test. Enable user-select for Safari (dart-lang/co19#1362)

Change-Id: Ic09ebc4ba8563739bc2d1b6d95ad789019a43272
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/274385
Reviewed-by: Alexander Thomas <[email protected]>
Commit-Queue: Alexander Thomas <[email protected]>

Author: sgrekhov

DEPS

@@ -53,7 +53,7 @@ vars = {
   # hashes.
   "co19_rev": "1caf238b37bb19081029a6580f31a728b1359dc0",
   # This line prevents conflicts when both packages are rolled simultaneously.
-  "co19_2_rev": "9f28a5f173bd39c9b97a691e7abcba6fdf80b47b",
+  "co19_2_rev": "56f45529ff2818e8549d6e092fc478e73d68fcc0",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "599aa474a03c37be146f82dfbad85f34f25ffa47",