This PR fixes a warning that was present in release mode, which was
preventing the nightly builds from running:
```
error: variable does not need to be mutable
--> crates/gpui2/src/elements/div.rs:547:9
|
547 | let mut div = Div {
| ----^^^
| |
| help: remove this `mut`
|
= note: `-D unused-mut` implied by `-D warnings`
```
Release Notes:
- N/A
Marshall Bowers
bc3e6649f8