chore: remove stale clirr disable (#4206)

Change-Id: Ib7eaabc372c7c64af4bcdbbb51458d9ac6ff3757

Author: igorbernstein2

bigtable-client-core-parent/bigtable-hbase/pom.xml

@@ -221,14 +221,6 @@ limitations under the License.
 
   <build>
     <plugins>
-      <plugin>
-        <!-- skip for bigtable-hbase to allow for upcoming refactoring-->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>clirr-maven-plugin</artifactId>
-        <configuration>
-          <skip>true</skip>
-        </configuration>
-      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>