fix: staticcheck and deadcode findings repo-wide, modernize counting loops

lint/abi.go

@@ -119,7 +119,7 @@ func fieldsSizeAlign(list *ast.FieldList) (size, align int, ok bool) {
 		if n == 0 {
 			n = 1
 		}
-		for i := 0; i < n; i++ {
+		for range n {
 			offset = alignUp(offset, ea)
 			offset += es
 		}