Warning when deleting a split area. #513

Describe the bug:
When deleting a split area, the following warning appears in the console:
as-split: Percent areas must total 100%
After reviewing my implementation, I confirmed that the area sizes are set correctly.
In my use case, I always have at least 1 and at most 2 split areas at any given time.

• When starting with one area or adding a second area, everything works as expected, and no warnings appear.
• However, when deleting one of the areas, the warning is triggered—even though the remaining area is configured correctly.

Library version:
@angular-split version: "^19.0.0",
angular: 19 (latest).

Steps to reproduce the issue:

I created a demo to reproduce the issue:
Remove area demo

1. Start with 2 split area.
2. Delete one of the areas programmatically(by button click).

Observe the warning in the console:
as-split: Percent areas must total 100%

Expected behavior:
Deleting a split area should not result in a warning.