removes redundant warning log

Author: daniel-mohedano

dd-java-agent/instrumentation/weaver/src/main/java/datadog/trace/instrumentation/weaver/WeaverUtils.java

@@ -46,7 +46,6 @@ public static Class<?> getClass(String className) {
       return CLASS_LOADER.loadClass(className);
     } catch (Exception e) {
       log.debug("Could not load class {}", className, e);
-      log.warn("Could not load a Weaver class");
       return null;
     }
   }