refactor(hive-c0re): drop the request_init_config tool and InitConfig approval

swarm-controller's `InitAgentConfigRepo` node already covers config-repo
creation, so this deletes a duplicate rather than a capability; old
`init_config` rows are skipped by `collect_lenient` with no migration, by
operator decision.

Refs #4398

hive-sh4re/src/approvals.rs

@@ -49,12 +49,6 @@ pub enum ApprovalKind {
     /// Create + start a new sub-agent container with the given name
     /// (under the default `agent.nix` template).
     Spawn,
-    /// Create an agent's config repo and seed it from the default
-    /// template (step 1 of the two-step spawn flow). Creating it is the
-    /// whole of this step — tailoring what the template seeded is not a
-    /// separate mechanism, it's a `MergeConfigPr` like every later
-    /// change.
-    InitConfig,
     /// Run `nix flake update [inputs...]` on the meta flake and commit
     /// the resulting lock changes.
     UpdateMetaInputs,