Don't Label prefix the inner type of a labeled metric

Author: badboy

glean_parser/rust.py

@@ -97,7 +97,7 @@ def type_name(obj):
     """
 
     if getattr(obj, "labeled", False):
-        return "LabeledMetric<Labeled{}>".format(class_name(obj.type))
+        return "LabeledMetric<{}>".format(class_name(obj.type))
     generate_enums = getattr(obj, "_generate_enums", [])  # Extra Keys? Reasons?
     if len(generate_enums):
         for name, suffix in generate_enums: