Implement new method scriptRemoved(CompiledScript) in ScriptEngineService

This [PR](#8062) broke ScriptEngineService by adding a new method `scriptRemoved(CompiledScript)`.

Closes #23.

Author: dadoonet

src/main/java/org/elasticsearch/script/python/PythonScriptEngineService.java

@@ -25,10 +25,7 @@
 import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.script.ExecutableScript;
-import org.elasticsearch.script.ScoreAccessor;
-import org.elasticsearch.script.ScriptEngineService;
-import org.elasticsearch.script.SearchScript;
+import org.elasticsearch.script.*;
 import org.elasticsearch.search.lookup.SearchLookup;
 import org.python.core.Py;
 import org.python.core.PyCode;
@@ -104,6 +101,11 @@ public void close() {
         interp.cleanup();
     }
 
+    @Override
+    public void scriptRemoved(@Nullable CompiledScript compiledScript) {
+        // Nothing to do
+    }
+
     public class PythonExecutableScript implements ExecutableScript {
 
         private final PyCode code;