Don't call dict.pop() with named arguments

Even though Bazel is fine with the code as is, Go Starlark's dict.pop()
only takes positional arguments. My assumption is that this is correct,
because Python does so as well.

def.bzl

@@ -205,7 +205,7 @@ def _gazelle_kwargs_prepare(name, kwargs):
         kwargs["extra_args"] = kwargs["args"]
         kwargs.pop("args")
 
-    visibility = kwargs.pop("visibility", default = None)
+    visibility = kwargs.pop("visibility", None)
     return name + "-runner", visibility
 
 def gazelle(name, **kwargs):

internal/bzlmod/go_deps.bzl

@@ -595,8 +595,8 @@ def _go_deps_impl(module_ctx):
     for path, module in module_resolutions.items():
         if hasattr(module, "module_name"):
             # Do not create a go_repository for a Go module provided by a bazel_dep.
-            root_module_direct_deps.pop(_repo_name(path), default = None)
-            root_module_direct_dev_deps.pop(_repo_name(path), default = None)
+            root_module_direct_deps.pop(_repo_name(path), None)
+            root_module_direct_dev_deps.pop(_repo_name(path), None)
             continue
         if getattr(module_ctx, "is_isolated", False) and path in _SHARED_REPOS:
             # Do not create a go_repository for a dep shared with the non-isolated instance of