Fix table of content
The file is shared between internal (g3doc) and external (Bazel website). The two engines are using a different TOC syntax.
RELNOTES: None.
@@ -11,7 +11,6 @@ page gathers the current best practices and frameworks by use case.
* ToC
{:toc}
-
## For testing rules
[Skylib](https://github.com/bazelbuild/bazel-skylib) has a test framework called
