Update setup

Author: nghia-vo

setup.py

@@ -28,14 +28,13 @@
               'Fisheye distortion'],
     url="https://github.com/DiamondLightSource/discorpy",
     download_url='https://github.com/DiamondLightSource/discorpy.git',
-    license="Apache 2.0",
+    license="Apache-2.0",
     platforms="Any",
     packages=setuptools.find_packages(include=["discorpy", "discorpy.*"],
                                       exclude=['test*', 'doc*', 'data*',
                                                'example*']),
     classifiers=[
         "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: Apache Software License",
         "Intended Audience :: Science/Research",
         "Operating System :: OS Independent",
         "Natural Language :: English",