Remove pyXX prefix for lint, docs, and coverage

pylintrc

@@ -56,4 +56,4 @@ ignore-docstrings=yes
 # (useful for modules/projects where namespaces are manipulated during runtime
 # and thus existing member attributes cannot be deduced by static analysis. It
 # supports qualified module names, as well as Unix pattern matching.
-ignored-modules=numpy,numpy.*,scipy.stats,scipy.spatial
+ignored-modules=numpy,numpy.*,scipy,scipy.spatial,scipy.stats,scipy.spatial.qhull

tox.ini

@@ -7,16 +7,17 @@ testdeps =
 [tox]
 envlist =
     py{37,38,39,310}
-    py38-lint
-    py38-coverage
-    py38-docs
+    lint
+    coverage
+    docs
 
 [testenv]
 deps = {[base]testdeps}
 extras = plotly
 commands = pytest {posargs}
 
-[testenv:py38-lint]
+[testenv:lint]
+basepython=python3.7
 deps =
     pycodestyle
     pydocstyle
@@ -27,7 +28,8 @@ commands =
     pydocstyle --match-dir='(?!test).*' {toxinidir}/neurom
     pylint --rcfile=pylintrc --extension-pkg-whitelist=numpy --ignore=tests neurom
 
-[testenv:py38-coverage]
+[testenv:coverage]
+basepython=python3.8
 deps =
     {[base]testdeps}
     pytest-cov
@@ -38,7 +40,8 @@ commands =
     --cov-fail-under=100 \
     --cov-report=xml
 
-[testenv:py38-docs]
+[testenv:docs]
+basepython=python3.8
 changedir = doc
 extras = docs
 commands =
@@ -58,7 +61,7 @@ convention = google
 
 [gh-actions]
 python =
-  3.7: py37
-  3.8: py38
+  3.7: py37, lint
+  3.8: py38, docs, coverage
   3.9: py39
   3.10: py310