Drop stale Controllers-panel hint ("Esc: quit")

The inline hint still claimed Esc quits (no longer true) and duplicated the
F1 shortcut + RPT-capture note that the Help menu already lists. Remove the
redundant block; the Help menu is the single source for those.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

host/src/controllers_panel.cpp

@@ -73,8 +73,6 @@ void ControllersPanel::draw(const InputSnapshot& input, const HookStatusView& st
 	ImGui::Begin("Controllers");
 
 	ImGui::Text("Input backend: %s", input.backend);
-	ImGui::TextDisabled("This window is what Remote Play Together captures.");
-	ImGui::TextDisabled("F1: hide overlay (clean mirror)   Esc: quit");
 
 #ifdef COOP_WITH_STEAM
 	ImGui::Checkbox("Use Steam Input (experimental)", &steam_requested_);