Fix various linting errors

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

cmd/prometheus/query_log_test.go

@@ -72,7 +72,7 @@ func (p *queryLogTest) waitForPrometheus() error {
 	var err error
 	for x := 0; x < 20; x++ {
 		var r *http.Response
-		if r, err = http.Get(fmt.Sprintf("http://%s:%d%s/-/ready", p.host, p.port, p.prefix)); err == nil && r.StatusCode == 200 {
+		if r, err = http.Get(fmt.Sprintf("http://%s:%d%s/-/ready", p.host, p.port, p.prefix)); err == nil && r.StatusCode == http.StatusOK {
 			break
 		}
 		time.Sleep(500 * time.Millisecond)

discovery/eureka/client.go

@@ -97,6 +97,7 @@ func fetchApps(ctx context.Context, server string, client *http.Client) (*Applic
 		resp.Body.Close()
 	}()
 
+	//nolint:usestdlibvars
 	if resp.StatusCode/100 != 2 {
 		return nil, fmt.Errorf("non 2xx status '%d' response during eureka service discovery", resp.StatusCode)
 	}

discovery/hetzner/robot.go

@@ -87,6 +87,7 @@ func (d *robotDiscovery) refresh(context.Context) ([]*targetgroup.Group, error)
 		resp.Body.Close()
 	}()
 
+	//nolint:usestdlibvars
 	if resp.StatusCode/100 != 2 {
 		return nil, fmt.Errorf("non 2xx status '%d' response during hetzner service discovery with role robot", resp.StatusCode)
 	}

notifier/notifier.go

@@ -616,6 +616,7 @@ func (n *Manager) sendOne(ctx context.Context, c *http.Client, url string, b []b
 	}()
 
 	// Any HTTP status 2xx is OK.
+	//nolint:usestdlibvars
 	if resp.StatusCode/100 != 2 {
 		return fmt.Errorf("bad response status %s", resp.Status)
 	}

storage/remote/client.go

@@ -231,6 +231,7 @@ func (c *Client) Store(ctx context.Context, req []byte, attempt int) error {
 		httpResp.Body.Close()
 	}()
 
+	//nolint:usestdlibvars
 	if httpResp.StatusCode/100 != 2 {
 		scanner := bufio.NewScanner(io.LimitReader(httpResp.Body, maxErrMsgLen))
 		line := ""
@@ -239,6 +240,7 @@ func (c *Client) Store(ctx context.Context, req []byte, attempt int) error {
 		}
 		err = fmt.Errorf("server returned HTTP status %s: %s", httpResp.Status, line)
 	}
+	//nolint:usestdlibvars
 	if httpResp.StatusCode/100 == 5 ||
 		(c.retryOnRateLimit && httpResp.StatusCode == http.StatusTooManyRequests) {
 		return RecoverableError{err, retryAfterDuration(httpResp.Header.Get("Retry-After"))}
@@ -323,6 +325,7 @@ func (c *Client) Read(ctx context.Context, query *prompb.Query) (*prompb.QueryRe
 		return nil, fmt.Errorf("error reading response. HTTP status code: %s: %w", httpResp.Status, err)
 	}
 
+	//nolint:usestdlibvars
 	if httpResp.StatusCode/100 != 2 {
 		return nil, fmt.Errorf("remote server %s returned HTTP status %s: %s", c.urlString, httpResp.Status, strings.TrimSpace(string(compressed)))
 	}

web/api/v1/api_test.go

@@ -2973,10 +2973,8 @@ func assertAPIError(t *testing.T, got *apiError, exp errorType) {
 	t.Helper()
 
 	if exp == errorNone {
-		//nolint:testifylint
 		require.Nil(t, got)
 	} else {
-		//nolint:testifylint
 		require.NotNil(t, got)
 		require.Equal(t, exp, got.typ, "(%q)", got)
 	}