docs, comments: drop references to the removed model/effort picker

subagent.md no longer says the web UI's model picker offers
availableModels, and the comments in Dropdown, ComponentsPage and
WantedMenu no longer point at the deleted per-agent Picker.

frontend/packages/swarm-ui/src/pages/ComponentsPage.tsx

@@ -167,8 +167,7 @@ function RefreshIntervalPickerSample() {
 }
 
 // The badge-triggers-a-dropdown-right-underneath-itself pattern this is
-// meant to land — the model/effort picker shape from the per-agent
-// terminal, demoed here with sample data. The wrapper
+// meant to land, demoed here with sample data. The wrapper
 // needs `position: relative` (`.components-badge-anchor`) so `Dropdown`
 // anchors under this badge specifically, not the page.
 function BadgePickerSample() {
@@ -528,7 +527,7 @@ export function ComponentsPage() {
           <Sample label="with a label prefix">
             <Badge label="ctx" value="534k" />
           </Sample>
-          <Sample label="interactive, opens a Dropdown (model/effort picker shape)">
+          <Sample label="interactive, opens a Dropdown">
             <BadgePickerSample />
           </Sample>
           <Sample label="interactive, toggles itself (pause/resume shape)">

frontend/packages/swarm-ui/src/pages/agents/WantedMenu.tsx

@@ -8,7 +8,7 @@
 // explicit — a dropdown just lets "up" be picked directly regardless
 // of what's inferred, no flip-to-the-opposite-of-a-guess involved
 // (mara: "when no state is declared, i want to set it to online").
-// Presentational only, same split as `StatusChips`'s `Picker`/
+// Presentational only, same split as `StatusChips`'s
 // `StatusMenu`: the caller owns what each selection actually does.
 //
 // "paused" has no separate resume option here — selecting "up" from a