Remove unpublished runtime crates from versions table (#789)

## Motivation and Context
This PR will keep crate versions table in `CHANGELOG.md` in sync with
#768 and
#787.

By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

Co-authored-by: Yuki Saito <awsaito@amazon.com>

CHANGELOG.md

@@ -369,7 +369,6 @@ April 12th, 2023
 |aws-smithy-query|0.55.1|
 |aws-smithy-runtime|0.55.1|
 |aws-smithy-runtime-api|0.55.1|
-|aws-smithy-runtime-test|0.1.0|
 |aws-smithy-types|0.55.1|
 |aws-smithy-types-convert|0.55.1|
 |aws-smithy-xml|0.55.1|
@@ -742,9 +741,6 @@ April 5th, 2023
 |aws-smithy-json|0.55.0|
 |aws-smithy-protocol-test|0.55.0|
 |aws-smithy-query|0.55.0|
-|aws-smithy-runtime|0.55.0|
-|aws-smithy-runtime-api|0.55.0|
-|aws-smithy-runtime-test|0.1.0|
 |aws-smithy-types|0.55.0|
 |aws-smithy-types-convert|0.55.0|
 |aws-smithy-xml|0.55.0|