Merge branch 'main' of github.com:drone/ff-java-server-sdk into main

Author: rushabh-harness

pom.xml

@@ -131,23 +131,12 @@
             <version>1.7.30</version>
         </dependency>
 
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>1.7.30</version>
-        </dependency>
-
         <dependency>
             <groupId>com.github.ben-manes.caffeine</groupId>
             <artifactId>caffeine</artifactId>
             <version>2.8.5</version>
         </dependency>
 
-        <dependency>
-            <groupId>org.ehcache</groupId>
-            <artifactId>ehcache</artifactId>
-            <version>3.0.0</version>
-        </dependency>
         <dependency>
             <groupId>com.lmax</groupId>
             <artifactId>disruptor</artifactId>