Function removeFirstChild

removeFirstChild<A>(self: Tree<A>): Tree<A>
Remove first child of given tree.
Type Parameters
- A
  Tree underlying type.
Parameters
- self: Tree<A>
  The tree from which a node will be removed.
Returns Tree<A>
The tree with on less node.
Example
```
import * as Tree from 'effect-tree'

const tree = Tree.branch(1, [Tree.of(2), Tree.of(3), Tree.of(4)])
const changed = Tree.removeFirstChild(tree)

expect(Tree.getForest(changed)).toEqual([Tree.of(3), Tree.of(4)])
```
- Defined in src/tree/remove.ts:100