Remove billing data query Registry 1.0 vestiges

These were a few straggling special cases to deal with Registry 1.0 data;
that data was removed ages ago and I just never got around to cleaning these
up.  This removes them at long last.

There were also some TODOs for the same bug around better TLD extraction that
supports multi-part TLDs (though that's pretty unrelated to Registry 1.0/2.0),
so I fixed those since it turns out supporting multi-part TLDs is trivial.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=151003181

java/google/registry/tools/sql/registry_data_view.sql

@@ -39,8 +39,5 @@ SELECT
     AS reservedListPaths,
 FROM
   [%SOURCE_DATASET%.Registry]
-WHERE
-   -- Filter out Registry 1.0 data - TODO(b/20828509): remove this.
-  __key__.namespace = ''
 ORDER BY
   tld