## Summary
This PR brings back the functionality to remove empty strings when
converting to an f-string in `UP032`.
For context, https://github.com/astral-sh/ruff/pull/8712 added this
functionality to remove _trailing_ empty strings but it got removed in
https://github.com/astral-sh/ruff/pull/8697 possibly unexpectedly so.
There's one difference which is that this PR will remove _any_ empty
strings and not just trailing ones. For example,
```diff
--- /Users/dhruv/playground/ruff/src/UP032.py
+++ /Users/dhruv/playground/ruff/src/UP032.py
@@ -1,7 +1,5 @@
(
- "{a}"
- ""
- "{b}"
- ""
-).format(a=1, b=1)
+ f"{1}"
+ f"{1}"
+)
```
## Test Plan
Run `cargo insta test` and update the snapshots.
9200dfc79f