patch 8.2.4375: ctx_imports is not used

Problem:    ctx_imports is not used.
Solution:   Delete ctx_imports.  Add missing dependency.
diff --git a/src/vim9script.c b/src/vim9script.c
index fde51c9..74f9325 100644
--- a/src/vim9script.c
+++ b/src/vim9script.c
@@ -593,7 +593,7 @@
     {
 	imported_T  *imported;
 
-	imported = find_imported(as_name, STRLEN(as_name), FALSE, cctx);
+	imported = find_imported(as_name, STRLEN(as_name), FALSE);
 	if (imported != NULL && imported->imp_sid != sid)
 	{
 	    semsg(_(e_name_already_defined_str), as_name);