Mark Formatter as provided, remove dependency on Arc.

Change-Id: Ia5faeefbaf541381e44c53f621d0c08ae28ec2ad
diff --git a/runtime/pom.xml b/runtime/pom.xml
index 8b6616b..f0f502a 100644
--- a/runtime/pom.xml
+++ b/runtime/pom.xml
@@ -15,7 +15,7 @@
   <dependencies>
     <dependency>
       <groupId>io.quarkus</groupId>
-      <artifactId>quarkus-arc</artifactId>
+      <artifactId>quarkus-core</artifactId>
     </dependency>
     <dependency>
       <groupId>io.quarkus</groupId>