refactor: drop fsonitfy wrapper

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

viper.go

@@ -439,7 +439,7 @@ func (v *Viper) WatchConfig() {
 	initWG := sync.WaitGroup{}
 	initWG.Add(1)
 	go func() {
-		watcher, err := newWatcher()
+		watcher, err := fsnotify.NewWatcher()
 		if err != nil {
 			v.logger.Error(fmt.Sprintf("failed to create watcher: %s", err))
 			os.Exit(1)

watch.go

@@ -1,11 +0,0 @@
-//go:build darwin || dragonfly || freebsd || openbsd || linux || netbsd || solaris || windows
-
-package viper
-
-import "github.com/fsnotify/fsnotify"
-
-type watcher = fsnotify.Watcher
-
-func newWatcher() (*watcher, error) {
-	return fsnotify.NewWatcher()
-}

watch_unsupported.go

@@ -1,31 +0,0 @@
-//go:build appengine || (!darwin && !dragonfly && !freebsd && !openbsd && !linux && !netbsd && !solaris && !windows)
-
-package viper
-
-import (
-	"fmt"
-	"runtime"
-
-	"github.com/fsnotify/fsnotify"
-)
-
-func newWatcher() (*watcher, error) {
-	return &watcher{}, fmt.Errorf("fsnotify not supported on %s", runtime.GOOS)
-}
-
-type watcher struct {
-	Events chan fsnotify.Event
-	Errors chan error
-}
-
-func (*watcher) Close() error {
-	return nil
-}
-
-func (*watcher) Add(name string) error {
-	return nil
-}
-
-func (*watcher) Remove(name string) error {
-	return nil
-}