Remove likely unneeded step, exclude tmp for generated code

Author: petergoldstein

.github/workflows/ci.yml

@@ -18,7 +18,6 @@ jobs:
         with:
           ruby-version: '3.0'
       - run: script/update_rubygems_and_install_bundler
-      - run: script/clone_all_rspec_repos
       - run: bundle install --standalone
       - run: bundle binstubs --all
       - run: script/run_rubocop

.rubocop.yml

@@ -6,6 +6,7 @@ AllCops:
     # Templates are really ERB which Rubocop does not parse
     - bin/**/*
     - lib/generators/rspec/*/templates/**/*
+    - tmp/**/*
 
 Bundler/DuplicatedGem:
   Enabled: false