remove explicit bazel_skylib dep

Author: mai93

tests/integration/ignore_root_user_error/WORKSPACE

@@ -15,15 +15,3 @@ python_register_toolchains(
     python_version = "3.9",
 )
 
-http_archive(
-    name = "bazel_skylib",
-    sha256 = "c6966ec828da198c5d9adbaa94c05e3a1c7f21bd012a0b29ba8ddbccb2c93b0d",
-    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.1.1/bazel-skylib-1.1.1.tar.gz",
-        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.1.1/bazel-skylib-1.1.1.tar.gz",
-    ],
-)
-
-load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
-
-bazel_skylib_workspace()