remove need for redirects.txt file

Author: mmcky

lectures/_config.yml

@@ -2,7 +2,6 @@ title: Python Programming for Economics and Finance
 author: Thomas J. Sargent & John Stachurski
 logo: _static/qe-logo.png
 description: This website presents a set of lectures on python programming for economics, designed and written by Thomas J. Sargent and John Stachurski.
-exclude_patterns: [_build, Thumbs.db, .DS_Store, "**.ipynb_checkpoints", redirects.txt]
 
 execute:
   execute_notebooks: "cache"
@@ -28,4 +27,5 @@ sphinx:
       description: This website presents a set of lectures on python programming for economics, designed and written by Thomas J. Sargent and John Stachurski.
       keywords: Python, QuantEcon, Quantitative Economics, Economics, Sloan, Alfred P. Sloan Foundation, Tom J. Sargent, John Stachurski
       google_analytics_id: UA-54984338-9
-    rediraffe_redirects: "redirects.txt"
+    rediraffe_redirects:
+      index_toc.md: intro.md