Make cc_toolchain_info.bzl public

This is required to be able to use it in the unix and windows
toolchains that get generated in a separate repository.

Author: limdor

cc/toolchains/cc_toolchain_info.bzl

@@ -13,16 +13,6 @@
 # limitations under the License.
 """All providers for rule-based bazel toolchain config."""
 
-# Until the providers are stabilized, ensure that rules_cc is the only place
-# that can access the providers directly.
-# Once it's stabilized, we *may* consider opening up parts of the API, or we may
-# decide to just require users to use the public user-facing rules.
-visibility([
-    "//cc/toolchains/...",
-    "//cc/private/toolchain/...",
-    "//tests/rule_based_toolchain/...",
-])
-
 # Note that throughout this file, we never use a list. This is because mutable
 # types cannot be stored in depsets. Thus, we type them as a sequence in the
 # provider, and convert them to a tuple in the constructor to ensure

cc/toolchains/impl/legacy_converter.bzl

@@ -27,12 +27,6 @@ load(
     legacy_with_feature_set = "with_feature_set",
 )
 
-visibility([
-    "//cc/toolchains/...",
-    "//cc/private/toolchain/...",
-    "//tests/rule_based_toolchain/...",
-])
-
 # Note that throughout this file, we sort anything for which the order is
 # nondeterministic (eg. depset's .to_list(), dictionary iteration).
 # This allows our tests to call equals() on the output,