Codestyle: Fix govet issues (#17178)

ref #10381

Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

pkg/api/metrics.go

@@ -89,6 +89,7 @@ func GetTestDataScenarios(c *m.ReqContext) Response {
 // Generates a index out of range error
 func GenerateError(c *m.ReqContext) Response {
 	var array []string
+	// nolint: govet
 	return JSON(200, array[20])
 }
 

pkg/api/pluginproxy/pluginproxy.go

@@ -129,11 +129,6 @@ func NewApiPluginProxy(ctx *m.ReqContext, proxyPath string, route *plugins.AppPl
 			req.URL.Host = targetURL.Host
 			req.Host = targetURL.Host
 			req.URL.Path = util.JoinURLFragments(targetURL.Path, proxyPath)
-
-			if err != nil {
-				ctx.JsonApiErr(500, "Could not interpolate plugin route url", err)
-				return
-			}
 		}
 
 		// reqBytes, _ := httputil.DumpRequestOut(req, true);