Make godeps restore/save clean

```
godep restore
rm -rf Godeps
godep save ./...
```

Will, after this change, have no diff.

Godeps/_workspace/src/github.com/codegangsta/negroni/negroni_test.go

@@ -72,4 +72,4 @@ func TestHandlers(t *testing.T) {
 	// exactly the same as the one that was registered earlier
 	handlers[0].ServeHTTP(response, (*http.Request)(nil), nil)
 	expect(t, response.Code, http.StatusOK)
-}
+}

Godeps/_workspace/src/github.com/garyburd/redigo/internal/commandinfo.go

@@ -12,7 +12,7 @@
 // License for the specific language governing permissions and limitations
 // under the License.
 
-package internal // import "github.com/garyburd/redigo/internal"
+package internal
 
 import (
 	"strings"

Godeps/_workspace/src/github.com/garyburd/redigo/redis/doc.go

@@ -166,4 +166,4 @@
 //   if _, err := redis.Scan(reply, &value1, &value2); err != nil {
 //      // handle error
 //  }
-package redis // import "github.com/garyburd/redigo/redis"
+package redis

Godeps/_workspace/src/github.com/shurcooL/sanitized_anchor_name/main.go

@@ -5,7 +5,7 @@
 //
 // At this time, it does not try to ensure that generated anchor names
 // are unique, that responsibility falls on the caller.
-package sanitized_anchor_name // import "github.com/shurcooL/sanitized_anchor_name"
+package sanitized_anchor_name
 
 import "unicode"