Remove @bazel_tools cc_import load

This unblocks the release of rules C++. We should load cc_import from rules_cc, but this is a bit more involved, because of the test setup

PiperOrigin-RevId: 767530162
Change-Id: Iafe64cfb0a77aae3780c9f0b2625bd7d5e63efa6
diff --git a/cc/system_library.bzl b/cc/system_library.bzl
index 8365eca..f3d0cc4 100644
--- a/cc/system_library.bzl
+++ b/cc/system_library.bzl
@@ -268,7 +268,6 @@
         executable = False,
         content =
             """
-load("//tools/build_defs/cc:cc_import.bzl", "cc_import")
 cc_import(
     name = "local_includes",
     {static_library}