Remove stale references to rwt. Ref #1018.

.travis.yml

@@ -15,8 +15,8 @@ matrix:
   - python: 2.7
     env: LC_ALL=C LC_CTYPE=C
 script:
- # need tox and rwt to get started
- - pip install tox rwt
+ # need tox to get started
+ - pip install tox
 
  # Output the env, to verify behavior
  - env

setup.py

@@ -19,7 +19,7 @@ def require_metadata():
     if not os.path.exists(egg_info_dir):
         msg = (
             "Cannot build setuptools without metadata. "
-            "Install rwt and run `rwt -- bootstrap.py`."
+            "Install rwt and run `bootstrap.py`."
         )
         raise RuntimeError(msg)