Remove mockito from powertools-serialization.

Author: phipag

powertools-serialization/pom.xml

@@ -98,13 +98,6 @@
     <profiles>
         <profile>
             <id>generate-graalvm-files</id>
-            <dependencies>
-                <dependency>
-                    <groupId>org.mockito</groupId>
-                    <artifactId>mockito-subclass</artifactId>
-                    <scope>test</scope>
-                </dependency>
-            </dependencies>
             <build>
                 <plugins>
                     <plugin>