Remove unnecessary variable assignments (#17695)

* Remove unnecessary variable assignments

As title

* enable ineffassign

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

contrib/environment-to-ini/environment-to-ini.go

@@ -224,7 +224,6 @@ func DecodeSectionKey(encoded string) (string, string) {
 	if !inKey {
 		if splitter := strings.Index(remaining, "__"); splitter > -1 {
 			section += remaining[:splitter]
-			inKey = true
 			key += remaining[splitter+2:]
 		} else {
 			section += remaining