DNM Revert "[build] Silence console spam from the snopt repository rule"

This reverts commit 70016f2.

tools/workspace/snopt/repository.bzl

@@ -45,22 +45,13 @@ def snopt_repository(
         commit = "0254e961cb8c60193b0862a0428fd6a42bfb5243"
         shallow_since = "1546539374 -0500"
 
-    # Passing None to the repository rule causes DEBUG output spam from Bazel
-    # asking us to drop the unused argument, so we'll only pass non-None.
-    kwargs = dict()
-    if commit != None:
-        kwargs.update(commit = commit)
-    if shallow_since != None:
-        kwargs.update(shallow_since = shallow_since)
-    if tag != None:
-        kwargs.update(tag = tag)
-    if branch != None:
-        kwargs.update(branch = branch)
-
     _snopt_repository(
         name = name,
         remote = remote,
-        **kwargs
+        commit = commit,
+        shallow_since = shallow_since,
+        tag = tag,
+        branch = branch,
     )
 
 def _setup_git(repo_ctx):