chore: fix old build todo (#2625)

Change-Id: Iad08446a65b201f1ca14dfef4c8392c755f56fb4

Author: igorbernstein2

google-cloud-bigtable/pom.xml

@@ -379,18 +379,6 @@
                   <goal>enforce</goal>
                 </goals>
               </execution>
-              <!-- Ensure that greatest version of each transitive dependency got selected -->
-              <execution>
-                <id>enforce-dependency-upper-bound</id>
-                <configuration>
-                  <rules>
-                    <requireUpperBoundDeps/>
-                  </rules>
-                </configuration>
-                <goals>
-                  <goal>enforce</goal>
-                </goals>
-              </execution>
             </executions>
             <!--
               workaround for https://github.com/mojohaus/extra-enforcer-rules/issues/132

pom.xml

@@ -214,23 +214,6 @@
     </dependencyManagement>
 
     <build>
-        <pluginManagement>
-            <plugins>
-                <!-- TODO: remove this next release -->
-                <!-- Temporarily disable requireUpperBoundDeps
-                    rule to downgrade bad grpc release:
-                     https://github.com/grpc/grpc-java/releases/tag/v1.68.0-->
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-enforcer-plugin</artifactId>
-                    <configuration>
-                        <rulesToSkip>requireUpperBoundDeps</rulesToSkip>
-                        <failIfNoRules>false</failIfNoRules>
-                    </configuration>
-                </plugin>
-            </plugins>
-        </pluginManagement>
-
         <plugins>
             <!-- Using maven site plugin only as a hook for javadoc:aggregate, don't need the reports -->
             <plugin>