Fix incorect Readme (#1609)

Author: jderusse

src/Service/EventBridge/CHANGELOG.md

@@ -2,12 +2,9 @@
 
 ## NOT RELEASED
 
-### Added
-
-- AWS api-change: Introduces a new rule state ENABLED_WITH_ALL_CLOUDTRAIL_MANAGEMENT_EVENTS for matching with Get, List and Describe AWS API call events from CloudTrail.
-
 ### Changed
 
+- AWS enhancement: Documentation updates.
 - Allow passing explicit null values for optional fields of input objects
 
 ## 1.5.1

src/Service/Sqs/CHANGELOG.md

@@ -2,9 +2,8 @@
 
 ## NOT RELEASED
 
-### Added
+### BC-BREAK
 
-- AWS api-change: This release enables customers to call SQS using AWS JSON-1.0 protocol and bug fix.
 - AWS api-change: This release enables customers to call SQS using AWS JSON-1.0 protocol.
 
 ### Changed

src/Service/StepFunctions/CHANGELOG.md

@@ -2,12 +2,9 @@
 
 ## NOT RELEASED
 
-### Added
-
-- AWS api-change: TODO
-
 ### Changed
 
+- AWS enhancement: Documentation updates.
 - Allow passing explicit null values for optional fields of input objects
 
 ## 1.2.0