remove unnecessary nil checks (#701)

Co-authored-by: Abdullah Alaadine <abdullah.aladdine@montymobile.com>

console.go

@@ -283,7 +283,7 @@ func (w ConsoleWriter) writeFields(evt map[string]interface{}, buf *bytes.Buffer
 func (w ConsoleWriter) writePart(buf *bytes.Buffer, evt map[string]interface{}, p string) {
 	var f Formatter
 
-	if w.PartsExclude != nil && len(w.PartsExclude) > 0 {
+	if len(w.PartsExclude) > 0 {
 		for _, exclude := range w.PartsExclude {
 			if exclude == p {
 				return

log.go

@@ -494,7 +494,7 @@ func (l *Logger) newEvent(level Level, done func(string)) *Event {
 	if level != NoLevel && LevelFieldName != "" {
 		e.Str(LevelFieldName, LevelFieldMarshalFunc(level))
 	}
-	if l.context != nil && len(l.context) > 1 {
+	if len(l.context) > 1 {
 		e.buf = enc.AppendObjectData(e.buf, l.context)
 	}
 	if l.stack {