always require pandas

Author: basnijholt

setup.py

@@ -52,7 +52,7 @@ def get_version_and_cmdclass(package_name):
     url="https://github.com/basnijholt/adaptive-scheduler",
     download_url="https://pypi.python.org/pypi/adaptive_scheduler",
     install_requires=requirements,
-    extras_require={"all": ["pandas", "dask_mpi"]},
+    extras_require={"all": ["dask_mpi"]},
     classifiers=[
         "Development Status :: 2 - Pre-Alpha",
         "Intended Audience :: Developers",