Revert accidentally landed shared ByteStore.

We decided not to land this, but I change it locally to test faster,
and forgot to revert with one of the CLs.

Change-Id: I4817c768778c0bb10fc0030fb5885bac8fbe2ce4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/162622
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/pkg/analyzer/test/src/dart/resolution/context_collection_resolution.dart b/pkg/analyzer/test/src/dart/resolution/context_collection_resolution.dart
index 3be8fa8..4e85656 100644
--- a/pkg/analyzer/test/src/dart/resolution/context_collection_resolution.dart
+++ b/pkg/analyzer/test/src/dart/resolution/context_collection_resolution.dart
@@ -127,7 +127,7 @@
     with ResourceProviderMixin, ResolutionTest {
   static bool _lintRulesAreRegistered = false;
 
-  static final ByteStore _byteStore = MemoryByteStore();
+  final ByteStore _byteStore = MemoryByteStore();
 
   Map<String, String> _declaredVariables = {};
   AnalysisContextCollection _analysisContextCollection;