Move hiscore client to rl-client

Thie removes the http-service hiscore api, which we haven't used in
awhile and doesn't work in practice due to upstream rate limits, as well
as the xp tracker which also hasn't been used in a long time since there
are now multiple quality community run xptrackers.

http-api/pom.xml

@@ -58,11 +58,6 @@
 			<artifactId>lombok</artifactId>
 			<scope>provided</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>commons-csv</artifactId>
-			<version>1.4</version>
-		</dependency>
 
 		<dependency>
 			<groupId>junit</groupId>