Remove python 3.10 tests (#25)

Author: jeylau

setup.cfg

@@ -15,7 +15,6 @@ classifiers =
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
     Topic :: Scientific/Engineering :: Artificial Intelligence
     Topic :: Scientific/Engineering :: Image Processing
     Topic :: Scientific/Engineering :: Visualization

tox.ini

@@ -1,26 +1,25 @@
 # For more information about tox, see https://tox.readthedocs.io/en/latest/
 [tox]
-envlist = py{38,39,310}-{linux,macos,windows}
+envlist = py{38,39}-{linux,macos,windows}
 isolated_build=true
 
 [gh-actions]
 python =
     3.8: py38
     3.9: py39
-    3.10: py310
-    
+
 [gh-actions:env]
 PLATFORM =
     ubuntu-latest: linux
     macos-latest: macos
     windows-latest: windows
 
 [testenv]
-platform = 
+platform =
     macos: darwin
     linux: linux
     windows: win32
-passenv = 
+passenv =
     CI
     GITHUB_ACTIONS
     DISPLAY XAUTHORITY