Remove Rails Autoscale and Reviewable images from README

Removed links and images for Rails Autoscale and Reviewable.

Author: justin808

README.md

@@ -206,12 +206,6 @@ The following companies support our open-source projects, and ShakaCode uses the
     <img alt="BrowserStack" src="https://user-images.githubusercontent.com/4244251/184881129-e1edf4b7-3ae1-4ea8-9e6d-3595cf01609e.png" height="55px">
   </picture>
 </a>
-<a href="https://railsautoscale.com">
-  <img src="https://user-images.githubusercontent.com/4244251/184881144-95c2c25c-9879-4069-864d-4e67d6ed39d2.png" alt="Rails Autoscale" height="55px">
-</a>
 <a href="https://www.honeybadger.io">
   <img src="https://user-images.githubusercontent.com/4244251/184881133-79ee9c3c-8165-4852-958e-31687b9536f4.png" alt="Honeybadger" height="55px">
 </a>
-<a href="https://reviewable.io">
-  <img src="https://user-images.githubusercontent.com/20628911/230848305-c94510a4-82d7-468f-bf9f-eeb81d3f2ce0.png" alt="Reviewable" height="55px">
-</a>