Remove unused imports and add changelog

CHANGELOG.md

@@ -40,6 +40,9 @@ Current
 
 ### Changed:
 
+- [DruidDimensionLoader is now a more generic DimensionValueLoader](https://github.com/yahoo/fili/pull/449)
+    * The `DimensionValueLoader` takes in a collection of `AbstractDimensionValueProvider`s to allow for non-Druid dimensions to be loaded.
+
 - [Use all available segment metadata in fili-generic-example](https://github.com/yahoo/fili/pull/445)
     * The fili-generic-example now uses all segment metadata given by Druid instead of just the first one and also provides it to the metadata service.
 

fili-core/src/main/java/com/yahoo/bard/webservice/application/AbstractDimensionValueProvider.java

@@ -17,8 +17,6 @@
 import org.slf4j.LoggerFactory;
 
 import java.util.List;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
 import java.util.stream.Collectors;
 
 /**

fili-core/src/main/java/com/yahoo/bard/webservice/application/DimensionValueLoader.java

@@ -4,20 +4,14 @@
 
 import com.yahoo.bard.webservice.config.SystemConfig;
 import com.yahoo.bard.webservice.config.SystemConfigProvider;
-import com.yahoo.bard.webservice.data.dimension.Dimension;
-import com.yahoo.bard.webservice.data.dimension.DimensionRow;
 import com.yahoo.bard.webservice.druid.client.FailureCallback;
 import com.yahoo.bard.webservice.druid.client.HttpErrorCallback;
 
 import org.joda.time.DateTime;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.util.Collection;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
 
 import javax.inject.Singleton;