Amend licence classifier

Author: Ashley Scillitoe

setup.py

@@ -14,8 +14,6 @@ def readme():
         "torch": ["torch>=1.7.0"]
 }
 
-LICENSE = "Apache 2.0"
-
 setup(
     name="alibi-detect",
     author="Seldon Technologies Ltd.",
@@ -25,7 +23,7 @@ def readme():
     long_description=readme(),
     long_description_content_type="text/markdown",
     url="https://github.com/SeldonIO/alibi-detect",
-    license=LICENSE,
+    license="Apache 2.0",
     packages=find_packages(),
     include_package_data=True,
     python_requires=">=3.7",
@@ -57,7 +55,7 @@ def readme():
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
-        f"License :: OSI Approved :: {LICENSE} License",
+        "License :: OSI Approved :: Apache Software License",
         "Topic :: Scientific/Engineering",
     ],
 )