chore: remove temp exclusion (#2673)

* chore: remove temp exclusion

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

README.md

@@ -57,13 +57,13 @@ implementation 'com.google.cloud:google-cloud-spanner'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-spanner:6.50.0'
+implementation 'com.google.cloud:google-cloud-spanner:6.50.1'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.50.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.50.1"
 ```
 <!-- {x-version-update-end} -->
 
@@ -432,7 +432,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-spanner/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-spanner.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.50.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.50.1
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

google-cloud-spanner-executor/pom.xml

@@ -90,14 +90,6 @@
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-spanner-executor-v1</artifactId>
       <version>1.4.0</version>
-      <!--   Temp exclusion. Remove next protobuf upgrade (to 3.23.3 or higher)
-         context: https://github.com/googleapis/sdk-platform-java/pull/1791#issuecomment-1601587713-->
-      <exclusions>
-        <exclusion>
-          <groupId>com.google.j2objc</groupId>
-          <artifactId>j2objc-annotations</artifactId>
-        </exclusion>
-      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>

google-cloud-spanner/pom.xml

@@ -194,14 +194,6 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <!--   Temp exclusion. Remove next protobuf upgrade (to 3.23.3 or higher)
-         context: https://github.com/googleapis/sdk-platform-java/pull/1791#issuecomment-1601587713-->
-      <exclusions>
-        <exclusion>
-          <groupId>com.google.j2objc</groupId>
-          <artifactId>j2objc-annotations</artifactId>
-        </exclusion>
-      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>