Remove stub index pages from _toc, leave as redirects.

Author: matthew-brett

_toc.yml

@@ -3,7 +3,6 @@ root: index
 parts:
   - caption: Getting started with Python for Science
     chapters:
-      - file: intro/index
       - file: intro/intro
       - file: intro/language/python_language
         sections:
@@ -28,7 +27,6 @@ parts:
       - file: intro/help/help
   - caption: Advanced topics
     chapters:
-      - file: advanced/index
       - file: advanced/advanced_python/index
       - file: advanced/advanced_numpy/index
       - file: advanced/debugging/index
@@ -43,7 +41,6 @@ parts:
       - file: advanced/interfacing_with_c/interfacing_with_c
   - caption: Packages and applications
     chapters:
-      - file: packages/index
       - file: packages/statistics/index
       - file: packages/sympy
       - file: packages/scikit-image/index

advanced/index.md

@@ -1,7 +1,13 @@
+---
+orphan: true
+---
+
 (advanced-topics-part)=
 
 # Introduction to advanced topics
 
 This part of the _Scientific Python Lectures_ is dedicated to advanced usage.
 It strives to educate the proficient Python coder to be an expert and
 tackles various specific topics.
+
+See the "Advanced topics" section in the table of contents.

intro/index.md

@@ -1,5 +1,11 @@
+---
+orphan: true
+---
+
 # Introduction to getting started
 
 This part of the _Scientific Python Lectures_ is a self-contained
 introduction to everything that is needed to use Python for science,
 from the language itself, to numerical computing or plotting.
+
+See the "Getting started with Python for Science" section in the table of contents.

packages/index.md

@@ -1,6 +1,12 @@
+---
+orphan: true
+---
+
 (applications-part)=
 
 # Introduction to packages and applications
 
 This part of the _Scientific Python Lectures_ is dedicated to various
 scientific packages useful for extended needs.
+
+See the "Packages and applications" section in the table of contents.