.circleci: Remove extra step for docs (#1251)

Author: Jorge Olivero

.circleci/config.yml

@@ -274,9 +274,6 @@ jobs:
  steps:
  - build_setup
  - restore_cargo_package_cache
- - run:
- name: Build Docs
- command: cargo doc --no-deps
  - run:
  name: Install MdBook
  command: cargo install mdbook