remove redundant jackson-dataformat-yaml dependency

Signed-off-by: Daniel Nägele <daniel@naegele.dev>

missilewars-plugin/pom.xml

@@ -98,14 +98,6 @@
             <scope>compile</scope>
         </dependency>
 
-        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-yaml -->
-        <dependency>
-            <groupId>com.fasterxml.jackson.dataformat</groupId>
-            <artifactId>jackson-dataformat-yaml</artifactId>
-            <version>2.14.2</version>
-            <scope>compile</scope>
-        </dependency>
-
         <dependency>
             <groupId>org.bstats</groupId>
             <artifactId>bstats-bukkit</artifactId>