Update index.md

index.md

@@ -28,17 +28,7 @@ chapter_deep-learning-computation/index
 chapter_convolutional-neural-networks/index
 chapter_convolutional-modern/index
 chapter_recurrent-neural-networks/index
-chapter_recurrent-modern/index
-chapter_attention-mechanisms/index
-chapter_optimization/index
-chapter_computational-performance/index
-chapter_computer-vision/index
-chapter_natural-language-processing-pretraining/index
-chapter_natural-language-processing-applications/index
-chapter_recommender-systems/index
-chapter_generative-adversarial-networks/index
-chapter_appendix-mathematics-for-deep-learning/index
-chapter_appendix-tools-for-deep-learning/index
+
 
 ```