Before this commit, the migration was removing the `AfterRenderPhase` enum from the imports but not the comma, resulting in invalid code:
ts
```
import { , Directive, afterRender } from '@angular/core';
```
This commit fixes this by using `updateNamedImports` and `replaceNode` instead of `removeNode`.
After:
ts
```
import { Directive, afterRender } from '@angular/core';
```
PR Close#56524
Adds an `ng update` migration to move users from using the phase flag
with `afterRender` / `afterNextRender` to passing a spec object instead.
PR Close#55648
cexbrayat