Revert "Also handle CMARK_NODE_LIST"

This reverts commit 27ba3a4.

Author: kevinbackhouse

src/blocks.c

@@ -1109,16 +1109,14 @@ static cmark_node *check_open_blocks(cmark_parser *parser, cmark_chunk *input,
       const size_t n_para = read_open_block_count(&tmp_parser, CMARK_NODE_PARAGRAPH);
       if (n_list + n_item + n_para == tmp_parser.total_open_blocks) {
         if (parser->current->flags & CMARK_NODE__OPEN_BLOCK) {
-          if (parser->current->flags & CMARK_NODE__OPEN) {
-            switch (S_type(parser->current)) {
-            case CMARK_NODE_PARAGRAPH:
-            case CMARK_NODE_LIST:
-            case CMARK_NODE_ITEM:
+          if (S_type(parser->current) == CMARK_NODE_PARAGRAPH) {
+            container = parser->current;
+            goto done;
+          }
+          if (S_type(parser->current) == CMARK_NODE_ITEM) {
+            if (parser->current->flags & CMARK_NODE__OPEN) {
               container = parser->current;
               cont_type = S_type(container);
-              break;
-            default:
-              break;
             }
           }
         }