remove comment about setuppyargs test package

Author: qwcode

tests/data/packages/README.txt

@@ -103,10 +103,3 @@ Is an empty package which install_requires the simple and simple2 packages.
 requires_simple_extra-0.1-py2.py3-none-any.whl
 ----------------------------------------------
 requires_simple_extra[extra] requires simple==1.0
-
-setuppyargs-0.1.tar.gz
-----------------------
-
-An empty package that will output the arguments with which its 'setup.py' was
-called when installed. If the PIPTEST_SETUPPYARGS_FILE environment variable is
-set, the argument list will be written to that file in json format.