remove shim exclusion in spark core test dep

Author: sryza

sql/pipelines/pom.xml

@@ -65,12 +65,6 @@
             <version>${project.version}</version>
             <type>test-jar</type>
             <scope>test</scope>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-connect-shims_${scala.binary.version}</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>