Fix AC import

Author: Wovchena

demos/time_series_forecasting_demo/python/README.md

@@ -12,12 +12,6 @@ The program provides an interactive CLI interface that gets a test dataset in .p
 
 ## Preparing to Run
 
-Install required dependencies with command:
-
-```sh
-pip install -r requirements.txt
-```
-
 The list of models supported by the demo is in `<omz_dir>/demos/whiteboard_inpainting_demo/python/models.lst` file.
 This file can be used as a parameter for [Model Downloader](../../../tools/model_tools/README.md) and Converter to download and, if necessary, convert models to OpenVINO Inference Engine format (\*.xml + \*.bin).
 

demos/time_series_forecasting_demo/python/time_series_forecasting_demo.py

@@ -21,7 +21,8 @@
 import matplotlib.pyplot as plt
 import matplotlib.animation as animation
 from openvino.runtime import Core, get_version
-from accuracy_checker.dataset import read_annotation
+from openvino.tools.accuracy_checker.dataset import read_annotation
+
 
 log.basicConfig(format='[ %(levelname)s ] %(message)s', level=log.DEBUG, stream=sys.stdout)