[chore] remove !windows in build restriction for redis doc.go (open-t…

…elemetry#30632)

**Description:** removes dead code

**Link to tracking Issue:**
[30461](open-telemetry#30461)

receiver/redisreceiver/doc.go

@@ -1,8 +1,6 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build !windows
-
 //go:generate mdatagen metadata.yaml
 
 package redisreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/redisreceiver"