fix minor lint issue (#68)

Summary:
**What:**

Lint

**Why:**

Red

**How:**
vim

**Risks:**

none

**Checklist**:

- [ ] Added tests, if you've added code that should be tested
- [ ] Updated the documentation, if you've changed APIs
- [x] Ensured the test suite passes
- [x] Made sure your code lints
- [x] Completed the Contributor License Agreement ("CLA")

Pull Request resolved: #68

Reviewed By: deathowl, pmazzini

Differential Revision: D57055675

Pulled By: abulimov

fbshipit-source-id: 6bbfc5a5028a1233bc18505082d343d679342543

dnsrocks/db/answer_test.go

@@ -362,7 +362,6 @@ func TestDBFindSOA(t *testing.T) {
 						tc.expectedLength, len(a.Ns))
 				})
 			}
-
 		})
 	}
 }