meter: remove wrapper

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

meter/wrapper/metrics_wrapper.go

@@ -1,50 +0,0 @@
-package wrapper
-
-import (
-	"context"
-	"time"
-
-	"github.com/unistack-org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/server"
-)
-
-// Wrapper provides a HandlerFunc for meter.Meter implementations
-type Wrapper struct {
-	meter meter.Meter
-}
-
-// New returns a *Wrapper configured with the given meter.Meter
-func New(meter meter.Meter) *Wrapper {
-	return &Wrapper{
-		meter: meter,
-	}
-}
-
-// HandlerFunc instruments handlers registered to a service:
-func (w *Wrapper) HandlerFunc(handlerFunction server.HandlerFunc) server.HandlerFunc {
-	return func(ctx context.Context, req server.Request, rsp interface{}) error {
-
-		// Build some tags to describe the call:
-		tags := metadata.New(2)
-		tags.Set("method", req.Method())
-
-		// Start the clock:
-		callTime := time.Now()
-
-		// Run the handlerFunction:
-		err := handlerFunction(ctx, req, rsp)
-
-		// Add a result tag:
-		if err != nil {
-			tags["status"] = "failure"
-		} else {
-			tags["status"] = "success"
-		}
-
-		// Instrument the result (if the DefaultClient has been configured):
-		w.meter.Summary("service.handler", tags).Update(float64(time.Since(callTime).Seconds()))
-
-		return err
-	}
-}