remove them from toc

Author: HumphreyYang

lectures/_toc.yml

@@ -50,8 +50,6 @@ parts:
   numbered: true
   chapters:
   - file: lp_intro
-  - file: comparative_adv
-  - file: nonlinear
   - file: short_path
 - caption: Modeling in Higher Dimensions
   numbered: true
@@ -69,7 +67,6 @@ parts:
   numbered: true
   chapters:
   - file: simple_linear_regression
-  - file: lr_with_matrices
   - file: mle
 - caption: Other
   numbered: true