remove overview article

Author: laujan

articles/cognitive-services/Translator/custom-translator/v2-preview/how-to/view-model-test-translation.md

@@ -21,7 +21,7 @@ Once your model has successfully trained, you can use translations to evaluate t
 
 BLEU (Bilingual Evaluation Understudy) is an algorithm for evaluating the precision or accuracy of text that has been machine translated from one language to another. Custom Translator uses the BLEU metric as one way of conveying translation accuracy.
 
-A BLEU score is a number between zero and 100. A score of zero indicates a very low quality translation where nothing in the translation matched the reference. A score of 100 indicates a perfect translation that is identical to the reference. It's not necessary to attain a score of 100—a BLEU score between 40 and 60 indicates a high quality translation.
+A BLEU score is a number between zero and 100. A score of zero indicates a low-quality translation where nothing in the translation matched the reference. A score of 100 indicates a perfect translation that is identical to the reference. It's not necessary to attain a score of 100—a BLEU score between 40 and 60 indicates a high-quality translation.
 
 [Read more](/azure/cognitive-services/translator/custom-translator/what-is-bleu-score?WT.mc_id=aiml-43548-heboelma)
 

articles/cognitive-services/Translator/custom-translator/v2-preview/project-overview.md

@@ -140,8 +140,6 @@ items:
   - name: Custom Translation | Preview
     expanded: true
     items:
-    - name: Overview
-      href: custom-translator/v2-preview/project-overview.md
     - name: Custom Translator for beginners
       href: custom-translator/v2-preview/beginners-guide.md
     - name: Quickstart