Fix: cleanup working dir after blender has exited

src/main/java/com/sheepit/client/Client.java

@@ -778,14 +778,8 @@ import okhttp3.HttpUrl;
 		
 		if (err != Error.Type.OK) {
 			this.log.error("Client::work problem with runRenderer (ret " + err + ")");
-			if (err == Error.Type.RENDERER_CRASHED_PYTHON_ERROR) {
-				this.log.error("Client::work failed with python error, cleaning directory in hope to recover");
-				this.configuration.cleanWorkingDirectory();
-			}
-			return err;
 		}
-		
-		return Error.Type.OK;
+		return err;
 	}
 	
 	protected Error.Type downloadSceneFile(Job ajob_) throws SheepItException {