Coalesce analyzer release notes for 0.26.0 (don't show alpha versions).

R=brianwilkerson@google.com

Review URL: https://codereview.chromium.org//1259793004 .
diff --git a/pkg/analyzer/CHANGELOG.md b/pkg/analyzer/CHANGELOG.md
index 7c67e09..294a7a4 100644
--- a/pkg/analyzer/CHANGELOG.md
+++ b/pkg/analyzer/CHANGELOG.md
@@ -1,30 +1,17 @@
 ## 0.26.0
 
-* No changes from 0.26.0-alpha.2.
-
-## 0.26.0-alpha.2
-
+* Add hook for listening to implicitly analyzed files
+* Add a PathFilter and AnalysisOptionsProvider utility classes to aid
+  clients in excluding files from analysis when directed to do so by an
+  options file.
+* API change: `UriResolver.resolveUri(..)` now takes an optional `actualUri`.
+* Change `ResolutionCopier.visitAwaitExpression` to copy *Type fields.
 * Fix highlight range for missing enum constant in switch (issue 23904).
 * Fix analyzer's treatment of `ClassName?.staticMember` to match spec.
 * Implement DEP 34 (less restricted mixins).
 * Fix some implementations of `UriResolver.resolveUri(..)` that did not
   properly handle the new `actualUri` argument.
 
-## 0.26.0-alpha.1
-
-* Change `ResolutionCopier.visitAwaitExpression` to copy *Type fields.
-
-## 0.26.0-alpha.0
-
-* API change: `UriResolver.resolveUri(..)` now takes an optional `actualUri`.
-
-## 0.25.3-alpha.0
-
-* Add hook for listening to implicitly analyzed files
-* Add a PathFilter and AnalysisOptionsProvider utility classes to aid
-  clients in excluding files from analysis when directed to do so by an
-  options file.
-
 ## 0.25.2
 
 * Requires Dart SDK 1.12-dev or greater