(doc) remove redundant exclutions

Author: slachiewicz

pom.xml

@@ -82,14 +82,6 @@
       <artifactId>plexus-testing</artifactId>
       <version>1.1.0</version>
       <scope>test</scope>
-      <exclusions>
-        <exclusion>
-          <!-- guice with aop not working on java >= 16 -->
-          <!-- should be fixed in plexus-testing -->
-          <groupId>com.google.inject</groupId>
-          <artifactId>guice</artifactId>
-        </exclusion>
-      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.google.inject</groupId>