[ci skip] Remove Caffeine dependency

Removed Caffeine dependency from pom.xml.

Author: HaHaWTH

bukkit/pom.xml

@@ -380,14 +380,6 @@
             <scope>provided</scope>
         </dependency>
 
-        <!-- Caffeine -->
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-            <version>2.9.3</version>
-            <scope>provided</scope>
-        </dependency>
-
         <!-- ConfigMe 1.3.1 as we can't update to 1.4+ -->
         <dependency>
             <groupId>ch.jalu</groupId>