[FLINK] Remove outdated Guava overrides to fix CVE-2023-2976 and CVE-2020-8908

Author: guptas6est

tools/ci/flink-ci-tools/pom.xml

@@ -48,6 +48,10 @@ under the License.
 			<artifactId>flink-test-utils-junit</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-slf4j-impl</artifactId>