Drop two dead lambda captures that only a dev build compiles

CameraPopup and StatusPanel each bind a toggle handler that captures this
and never uses it, inside an #if !BBL_RELEASE_TO_PUBLIC block. CMakeLists
defines that as $<CONFIG:Release>, so the block compiles in every
configuration except Release - and Release is the only one CI builds. Under
-Werror the two captures therefore fail RelWithDebInfo, which is what a
development build uses, while CI never sees them.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/slic3r/GUI/CameraPopup.cpp

@@ -82,7 +82,7 @@ CameraPopup::CameraPopup(wxWindow *parent)
     top_sizer->Add(m_text_liveview_retry, 0, wxALIGN_CENTER_VERTICAL | wxALIGN_LEFT | wxALL, FromDIP(5));
     top_sizer->Add(m_switch_liveview_retry, 0, wxALIGN_CENTER_VERTICAL | wxALIGN_RIGHT | wxALL, FromDIP(5));
 
-    m_switch_liveview_retry->Bind(wxEVT_TOGGLEBUTTON, [this](wxCommandEvent &e) {
+    m_switch_liveview_retry->Bind(wxEVT_TOGGLEBUTTON, [](wxCommandEvent &e) {
         wxGetApp().app_config->set("liveview", "auto_retry", e.IsChecked());
         e.Skip();
     });

src/slic3r/GUI/StatusPanel.cpp

@@ -1462,7 +1462,7 @@ wxBoxSizer *StatusBasePanel::create_monitoring_page()
 #if !BBL_RELEASE_TO_PUBLIC
     m_staticText_timelapse->Show();
     m_bmToggleBtn_timelapse->Show();
-    m_bmToggleBtn_timelapse->Bind(wxEVT_TOGGLEBUTTON, [this](wxCommandEvent &e) {
+    m_bmToggleBtn_timelapse->Bind(wxEVT_TOGGLEBUTTON, [](wxCommandEvent &e) {
         if (e.IsChecked())
             wxGetApp().getAgent()->start_subscribe("tunnel");
         else