test_all: remove Webdav Infinite Scale integration tests

These are broken and the submitter has not shown any interest in
fixing them.

fstest/test_all/config.yaml

@@ -479,17 +479,17 @@ backends:
    ignoretests:
      - cmd/bisync
      - cmd/gitannex
- - backend:  "webdav"
-   remote:   "TestWebdavInfiniteScale:"
-   ignore:
-     - TestIntegration/FsMkdir/FsEncoding/punctuation
-     - TestIntegration/FsMkdir/FsEncoding/invalid_UTF-8
-   env:
-      - RCLONE_NO_CHECK_CERTIFICATE=true
-   fastlist: false
-   ignoretests:
-     - cmd/bisync
-     - cmd/gitannex
+ # - backend:  "webdav"
+ #   remote:   "TestWebdavInfiniteScale:"
+ #   ignore:
+ #     - TestIntegration/FsMkdir/FsEncoding/punctuation
+ #     - TestIntegration/FsMkdir/FsEncoding/invalid_UTF-8
+ #   env:
+ #      - RCLONE_NO_CHECK_CERTIFICATE=true
+ #   fastlist: false
+ #   ignoretests:
+ #     - cmd/bisync
+ #     - cmd/gitannex
  - backend:  "webdav"
    remote:   "TestWebdavRclone:"
    ignore: