linter: Remove analyzer impl export

This reduce's linter's exposure of private analyzer API, which will
help with making LintRule public API.

Change-Id: I5af1961cf6e7e6c8554962d055a2f311256e3895
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/428901
Reviewed-by: Keerti Parthasarathy <keertip@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>

https://dart.googlesource.com/sdk/+/aa5f130ce8fbc366e4b6f580f8a48362bfea77d3

DEPS

diff --git a/DEPS b/DEPS
index e87944c..33a37d5 100644
--- a/DEPS
+++ b/DEPS
@@ -234,7 +234,7 @@
 ]
 
 deps = {
-  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'd56cabaf1f9c5d4b367373ebdd7ba62a85fa9e84',
+  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'aa5f130ce8fbc366e4b6f580f8a48362bfea77d3',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + 'c685293fc40c9448244fde08e6a38adc9b63f1d1',
 

commits.json

diff --git a/commits.json b/commits.json
index e957d55..a2217d7 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
   "flutter":"c685293fc40c9448244fde08e6a38adc9b63f1d1",
-  "flutter/engine/src/flutter/third_party/dart":"d56cabaf1f9c5d4b367373ebdd7ba62a85fa9e84"
+  "flutter/engine/src/flutter/third_party/dart":"aa5f130ce8fbc366e4b6f580f8a48362bfea77d3"
 }
\ No newline at end of file