message: Remove .html mentions in CONTRIBUTING
diff: @@ -439,7 +439,6 @@ Before a PR can be merged, it should satisfy the following:
  - [ ] Run `make unittest` to make sure all unit tests pass.
  - [ ] Run the tests in `tests/scripts`.
  - [ ] (LLNL only) After merging:
  - - [ ] Regenerate `README.html` files from companion documentation pull requests.
  - [ ] Update internal tests to include the new features.
  ### Master/Next Workflow
  @@ -512,7 +511,6 @@ MFEM uses a `master`/`next`-branch workflow as described below:
  - [ ] Check that continuous integration server configurations reflect the dependency version requirements of the new release
  - [ ] `.travis.yml`
  - [ ] `.appveyor.yml`
  -- [ ] (LLNL only) Make sure all `README.html` files in the source repo are up to date.
  - [ ] Tag the repository:
  ```
  