Fix compile failure

hapi-fhir-structures-dev/src/main/java/ca/uhn/fhir/model/dev/FhirDev.java

@@ -23,12 +23,10 @@ package ca.uhn.fhir.model.dev;
 import java.io.InputStream;
 
 import org.apache.commons.lang3.StringUtils;
-import org.hl7.fhir.instance.model.api.IBaseExtension;
 
 import ca.uhn.fhir.context.ConfigurationException;
 import ca.uhn.fhir.context.FhirVersionEnum;
 import ca.uhn.fhir.context.RuntimeResourceDefinition;
-import ca.uhn.fhir.model.api.ExtensionDt;
 import ca.uhn.fhir.model.api.IFhirVersion;
 import ca.uhn.fhir.model.api.IResource;
 import ca.uhn.fhir.model.base.composite.BaseContainedDt;

hapi-tinder-plugin/src/main/java/ca/uhn/fhir/model/dev/FhirDev.java

@@ -108,11 +108,5 @@ public class FhirDev implements IFhirVersion {
 	}
 
 
-	@Override
-	public IBaseExtension<?> newExtension() {
-		return null;
-	}
-
-
 
 }

hapi-tinder-plugin/src/main/java/ca/uhn/fhir/model/dstu/FhirDstu1.java

@@ -380,11 +380,6 @@ public class FhirDstu1 implements IFhirVersion {
 		return ContainedDt.class;
 	}
 
-	@Override
-	public IBaseExtension<?> newExtension() {
-		return null;
-	}
-
-
+	
 
 }

hapi-tinder-plugin/src/main/java/ca/uhn/fhir/model/dstu2/FhirDstu2.java

@@ -93,9 +93,5 @@ public class FhirDstu2 implements IFhirVersion {
 		throw new UnsupportedOperationException();
 	}
 
-	@Override
-	public IBaseExtension<?> newExtension() {
-		return null;
-	}
-
+	
 }