MINOR: [Integration] remove stale comment about Dictionary support in Go (#13862)
MINOR: [Integration] remove stale comment about Dictionary support in Go (#13862)

Go tests are no longer skipped here, and both of the referenced JIRAs have been resolved.

Authored-by: Neal Richardson <beb59f0141269d2d04e73d0dcc1967b64ba87e13@gmail.com>
Signed-off-by: Matt Topol <d813aa23445863e8ae12ff1849674f5a01b73692@gmail.com>
apache/arrow,apache/arrow,apache/arrow,kou/arrow,icexelloss/arrow,icexelloss/arrow,apache/arrow,kou/arrow,icexelloss/arrow,apache/arrow,icexelloss/arrow,kou/arrow,icexelloss/arrow,apache/arrow,apache/arrow,kou/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,kou/arrow,apache/arrow,kou/arrow,kou/arrow,kou/arrow,icexelloss/arrow,icexelloss/arrow,icexelloss/arrow,apache/arrow,kou/arrow,apache/arrow,icexelloss/arrow,apache/arrow,kou/arrow,apache/arrow,kou/arrow,icexelloss/arrow,kou/arrow,icexelloss/arrow,apache/arrow,icexelloss/arrow,kou/arrow,kou/arrow