[query] Remove dead code in prom package (#2871)

Author: vpranckaitis

src/query/api/v1/handler/prom/common.go

@@ -36,14 +36,6 @@ import (
 // formats with prometheus.
 // https://github.com/prometheus/prometheus/blob/43acd0e2e93f9f70c49b2267efa0124f1e759e86/web/api/v1/api.go#L1097
 
-const (
-	queryParam   = "query"
-	startParam   = "start"
-	endParam     = "end"
-	stepParam    = "step"
-	timeoutParam = "timeout"
-)
-
 var (
 	minTime = time.Unix(math.MinInt64/1000+62135596801, 0).UTC()
 	maxTime = time.Unix(math.MaxInt64/1000-62135596801, 999999999).UTC()
@@ -61,17 +53,6 @@ const (
 
 type errorType string
 
-const (
-	errorNone        errorType = ""
-	errorTimeout     errorType = "timeout"
-	errorCanceled    errorType = "canceled"
-	errorExec        errorType = "execution"
-	errorBadData     errorType = "bad_data"
-	errorInternal    errorType = "internal"
-	errorUnavailable errorType = "unavailable"
-	errorNotFound    errorType = "not_found"
-)
-
 type queryData struct {
 	ResultType promql.ValueType `json:"resultType"`
 	Result     promql.Value     `json:"result"`

src/query/api/v1/handler/prom/read.go

@@ -26,7 +26,6 @@ import (
 	"context"
 	"errors"
 	"net/http"
-	"time"
 
 	"github.com/m3db/m3/src/query/api/v1/handler/prometheus/handleroptions"
 	"github.com/m3db/m3/src/query/api/v1/handler/prometheus/native"
@@ -48,12 +47,6 @@ type readHandler struct {
 	logger    *zap.Logger
 }
 
-type readRequest struct {
-	query         string
-	start, end    time.Time
-	step, timeout time.Duration
-}
-
 func newReadHandler(
 	opts Options,
 	hOpts options.HandlerOptions,

src/query/api/v1/handler/prom/read_test.go

@@ -43,6 +43,12 @@ import (
 
 const promQuery = `http_requests_total{job="prometheus",group="canary"}`
 
+const (
+	queryParam = "query"
+	startParam = "start"
+	endParam   = "end"
+)
+
 var testPromQLEngine = newMockPromQLEngine()
 
 type testHandlers struct {
@@ -85,7 +91,7 @@ func defaultParams() url.Values {
 	now := time.Now()
 	vals.Add(queryParam, promQuery)
 	vals.Add(startParam, now.Format(time.RFC3339))
-	vals.Add(endParam, string(now.Add(time.Hour).Format(time.RFC3339)))
+	vals.Add(endParam, now.Add(time.Hour).Format(time.RFC3339))
 	vals.Add(handleroptions.StepParam, (time.Duration(10) * time.Second).String())
 	return vals
 }
@@ -94,7 +100,7 @@ func defaultParamsWithoutQuery() url.Values {
 	vals := url.Values{}
 	now := time.Now()
 	vals.Add(startParam, now.Format(time.RFC3339))
-	vals.Add(endParam, string(now.Add(time.Hour).Format(time.RFC3339)))
+	vals.Add(endParam, now.Add(time.Hour).Format(time.RFC3339))
 	vals.Add(handleroptions.StepParam, (time.Duration(10) * time.Second).String())
 	return vals
 }