Revert "Bazel: skylib|rules_proto|grpc"

This reverts commit f18a4f7c.

WORKSPACE

@@ -64,6 +64,22 @@ load("@com_github_grpc_grpc//bazel:grpc_extra_deps.bzl", "grpc_extra_deps")
 
 grpc_extra_deps()
 
+# grpc
+http_archive(
+    name = "com_github_grpc_grpc",
+    sha256 = "419dba362eaf8f1d36849ceee17c3e2ff8ff12ac666b42d3ff02a164ebe090e9",
+    strip_prefix = "grpc-1.30.0",
+    urls = ["https://github.com/grpc/grpc/archive/v1.30.0.tar.gz"],
+)
+
+load("@com_github_grpc_grpc//bazel:grpc_deps.bzl", "grpc_deps")
+
+grpc_deps()
+
+load("@com_github_grpc_grpc//bazel:grpc_extra_deps.bzl", "grpc_extra_deps")
+
+grpc_extra_deps()
+
 #new_local_repository(
 #    name = "opengl",
 #    build_file = "third_party/opengl.BUILD",