[FIX] web_editor: remove redundant code from setTagName

Commit [1] implemented an approach for changing style of a list item to normal.
It no longer wrapped the content in a <p> to remove extra spacing to next list
item. Later commit [2] was introduced which did the same thing but in sanatize.
Hence the code added in commit [1] is no longer needed.
This commit removes the redundant code from `setTagName`.

[1]: 03a134c
[2]: 324e138

closes odoo/odoo#141812

X-original-commit: bd1e432dc29be0dec6e52b142d9fb712335209b6
Signed-off-by: Antoine Guenet (age) <age@odoo.com>

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/utils.js

@@ -2084,11 +2084,8 @@ export function setTagName(el, newTagName) {
     while (el.firstChild) {
         n.append(el.firstChild);
     }
-    const closestLi = el.closest('li');
-    if (el.tagName === 'LI' && newTagName !== 'p') {
+    if (el.tagName === 'LI') {
         el.append(n);
-    } else if (closestLi && newTagName === 'p') {
-        closestLi.replaceChildren(...n.childNodes);
     } else {
         el.parentNode.replaceChild(n, el);
     }