Remove 'local' tag from pybind_extension (#35)

* Remove 'local' tag from pybind_extension

See #34 for more details. Remote cache in CI works as a charm.

build_defs.bzl

diff --git a/build_defs.bzl b/build_defs.bzl
index 4b99f83..1e55548 100644
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -45,7 +45,7 @@
             "//conditions:default": ["-Wl,-Bsymbolic"],
         }),
         linkshared = 1,
-        tags = tags + ["local"],
+        tags = tags,
         deps = deps + PYBIND_DEPS,
         **kwargs
     )