Revert docstring move for repository_rule
Revert docstring move for repository_rule

it doesn't have a doc attribute, and isn't supported by stardoc yet

alexeagle/rules_nodejs,bazelbuild/rules_nodejs,bazelbuild/rules_nodejs,bazelbuild/rules_nodejs,alexeagle/rules_nodejs,alexeagle/rules_nodejs,bazelbuild/rules_nodejs,alexeagle/rules_nodejs,bazelbuild/rules_nodejs