Remove outdated comment [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64394 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

appveyor.yml

@@ -137,7 +137,6 @@ for:
     - mingw32-make -j%JOBS%
     - mingw32-make -j%JOBS% install"
   test_script:
-    # Overriding TEST_EXCLUDES because `--name=!/memory_leak/` is considered as a positive filter on AppVeyor msys2.
     - mingw32-make test
     - mingw32-make -j%JOBS% test-all RUBY_FORCE_TEST_JIT=1 V=1
     - mingw32-make -j%JOBS% test-spec MSPECOPT=-j