Remove nonstandard ISCL short id from ISC license

The canonical short identifier for the ISC License is simply ISC;
see https://spdx.org/licenses/ISC.html.
This change aligns the ISC License classifier to match similar ones
such as MIT License, BSD License, etc.

src/trove_classifiers/__init__.py

@@ -223,7 +223,7 @@
     "License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)",
     "License :: OSI Approved :: Historical Permission Notice and Disclaimer (HPND)",
     "License :: OSI Approved :: IBM Public License",
-    "License :: OSI Approved :: ISC License (ISCL)",
+    "License :: OSI Approved :: ISC License",
     "License :: OSI Approved :: Intel Open Source License",
     "License :: OSI Approved :: Jabber Open Source License",
     "License :: OSI Approved :: MIT License",
@@ -745,6 +745,7 @@
 # A mapping from the deprecated classifier name to a list of zero or more valid
 # classifiers that should replace it
 deprecated_classifiers = {
+    "License :: OSI Approved :: ISC License (ISCL)": ["License :: OSI Approved :: ISC License"],
     "Natural Language :: Ukranian": ["Natural Language :: Ukrainian"],
     "Topic :: Communications :: Chat :: AOL Instant Messenger": [],
 }