docs: remove empty "changes in type checking" page

This relates to #10759. Just as
a general rule of thumb, I don't think we should have fully empty pages
in documentation like this. It's not a great look to the outside world.

[skip community_build]

refs: #10759

Author: ckipp01

docs/_docs/reference/changed-features/type-checking.md

@@ -92,7 +92,6 @@ subsection:
           - page: reference/changed-features/operators.md
           - page: reference/changed-features/wildcards.md
           - page: reference/changed-features/imports.md
-          - page: reference/changed-features/type-checking.md
           - page: reference/changed-features/type-inference.md
           - page: reference/changed-features/implicit-resolution.md
           - page: reference/changed-features/implicit-conversions.md

docs/sidebar.yml

@@ -88,7 +88,6 @@ subsection:
       - page: reference/changed-features/operators.md
       - page: reference/changed-features/wildcards.md
       - page: reference/changed-features/imports.md
-      - page: reference/changed-features/type-checking.md
       - page: reference/changed-features/type-inference.md
       - page: reference/changed-features/implicit-resolution.md
       - page: reference/changed-features/implicit-conversions.md