Template `wysiwyg.iframeContent`'s `#iframe_target` includes a `script`
element that defines an odoo module (`web_editor.wysiwyg.iniframe`).
`wysiwyg_iframe.js` resets the html of that target so that the node
prototypes are defined relative to the top window rather than the iframe
window. Resetting that html had as a side effect that the script was run
a second time while that is unnecessary given that the module has
already been defined. This resulted in an error, which is here fixed by
removing the `script` element from the html when resetting it.
closesodoo/odoo#69492
X-original-commit: 3d4e0f15dd9a0009a7d0fc19fc29a5df9a6f92e8
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>