Change check for error message as could not sdist off old setup.

Author: PGijsbers

setup.py

@@ -6,15 +6,11 @@
 with open("openml/__version__.py") as fh:
     version = fh.readlines()[-1].split()[-1].strip("\"'")
 
-try:
-    import numpy  # noqa: F401
-    import scipy  # noqa: F401
-except ImportError:
+if len(sys.argv) > 1 and sys.argv[1] == 'install':
     print('Please install this package with pip: `pip install -e .`'
           'Installation requires pip>=10.0')
     sys.exit(1)
 
-
 setuptools.setup(name="openml",
                  author="Matthias Feurer, Andreas Müller, Farzan Majdani, "
                         "Joaquin Vanschoren, Jan van Rijn and Pieter Gijsbers",