Update godeps for etcd 3.0.4

vendor/github.com/prometheus/common/expfmt/text_parse.go

@@ -108,13 +108,6 @@ func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricF
 			delete(p.metricFamiliesByName, k)
 		}
 	}
-	// If p.err is io.EOF now, we have run into a premature end of the input
-	// stream. Turn this error into something nicer and more
-	// meaningful. (io.EOF is often used as a signal for the legitimate end
-	// of an input stream.)
-	if p.err == io.EOF {
-		p.parseError("unexpected end of input stream")
-	}
 	return p.metricFamiliesByName, p.err
 }