chore: remove unused flattenTreeAll function

Replaced by buildGraphLines for log viewer tree rendering.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: FL4TLiN3

packages/tui-components/src/execution/hooks/use-delegation-tree.ts

@@ -133,40 +133,6 @@ export function getStatusCounts(state: DelegationTreeState): {
   return { running, waiting }
 }
 
-/** Flatten tree without pruning - shows all nodes including completed/error. For log viewer. */
-export function flattenTreeAll(state: DelegationTreeState): FlatTreeNode[] {
-  const result: FlatTreeNode[] = []
-  const visited = new Set<string>()
-
-  function dfs(nodeId: string, depth: number, isLast: boolean, ancestorIsLast: boolean[]) {
-    const node = state.nodes.get(nodeId)
-    if (!node || visited.has(nodeId)) return
-
-    visited.add(nodeId)
-    result.push({ node, depth, isLast, ancestorIsLast: [...ancestorIsLast] })
-
-    const children = node.childRunIds
-    for (let i = 0; i < children.length; i++) {
-      const childIsLast = i === children.length - 1
-      dfs(children[i]!, depth + 1, childIsLast, [...ancestorIsLast, isLast])
-    }
-  }
-
-  if (state.rootRunId) {
-    dfs(state.rootRunId, 0, true, [])
-  }
-
-  // Show orphaned nodes (no parent in tree) at root level
-  for (const [nodeId, node] of state.nodes) {
-    if (!visited.has(nodeId)) {
-      visited.add(nodeId)
-      result.push({ node, depth: 0, isLast: true, ancestorIsLast: [] })
-    }
-  }
-
-  return result
-}
-
 export function flattenTree(state: DelegationTreeState): FlatTreeNode[] {
   if (!state.rootRunId) return []
   const root = state.nodes.get(state.rootRunId)