Remove LGPLv3 license classifier

Delete the GNU Lesser General Public License v3 trove classifier from pyproject.toml to correct package metadata, following PEP 639

Author: C-Achard

pyproject.toml

@@ -13,7 +13,6 @@ classifiers = [
   "Development Status :: 2 - Pre-Alpha",
   "Framework :: napari",
   "Intended Audience :: Developers",
-  "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
   "Operating System :: OS Independent",
   "Programming Language :: Python :: 3 :: Only",
   "Programming Language :: Python :: 3.10",