[Doc] Disable tune-sklearn test until tests are fixed. (#11187)
[Doc] Disable tune-sklearn test until tests are fixed. (#11187)

Signed-off-by: Richard Liaw <3230d85c7494674e1ab9b2b5f7d3b4d6790b2a83@berkeley.edu>
richardliaw/ray,pcmoritz/ray-1,pcmoritz/ray-1,richardliaw/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,ray-project/ray,pcmoritz/ray-1,richardliaw/ray,ray-project/ray,ray-project/ray,richardliaw/ray,ray-project/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,ray-project/ray,richardliaw/ray,pcmoritz/ray-1,richardliaw/ray