remove unneeded reference to rules_pkg
Partial commit for third_party/*, see
@@ -3,8 +3,6 @@ load("//tools/distributions:distribution_rules.bzl", "distrib_jar_filegroup", "d
package(default_visibility = ["//visibility:public"])
-load("@rules_pkg//:pkg.bzl", "pkg_tar")
-
filegroup(
name = "srcs",
srcs = glob(["**"]) + [
