patch 8.2.5018: Vim9: some code is not covered by tests

Problem:    Vim9: some code is not covered by tests.
Solution:   Delete dead code.
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 48a913a..496f4cd 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -1151,7 +1151,7 @@
 	    generate_LOAD(cctx, ISN_LOADREG, name[1], NULL, &t_string);
 	    break;
 	case dest_vimvar:
-	    generate_LOADV(cctx, name + 2, TRUE);
+	    generate_LOADV(cctx, name + 2);
 	    break;
 	case dest_local:
 	    if (lvar->lv_from_outer > 0)