refactor(bluetooth): remove interval and timer thread

The timer thread was always reading the same value from Rfkill state.

include/modules/bluetooth.hpp

@@ -2,7 +2,6 @@
 
 #include "ALabel.hpp"
 #include "util/rfkill.hpp"
-#include "util/sleeper_thread.hpp"
 
 namespace waybar::modules {
 
@@ -13,8 +12,7 @@ class Bluetooth : public ALabel {
   auto update() -> void;
 
  private:
-  util::SleeperThread thread_;
-  util::Rfkill        rfkill_;
+  util::Rfkill rfkill_;
 };
 
 }  // namespace waybar::modules

man/waybar-bluetooth.5.scd

@@ -12,11 +12,6 @@ The *bluetooth* module displays information about the status of the device's blu
 
 Addressed by *bluetooth*
 
-*interval*: ++
-	typeof: integer ++
-	default: 60 ++
-	The interval in which the bluetooth state gets updated.
-
 *format*: ++
 	typeof: string  ++
 	default: *{icon}* ++
@@ -88,7 +83,6 @@ Addressed by *bluetooth*
 "bluetooth": {
 	"format": "{icon}",
 	"format-alt": "bluetooth: {status}",
-	"interval": 30,
 	"format-icons": {
 		"enabled": "",
 		"disabled": ""

src/modules/bluetooth.cpp

@@ -5,13 +5,6 @@
 waybar::modules::Bluetooth::Bluetooth(const std::string& id, const Json::Value& config)
     : ALabel(config, "bluetooth", id, "{icon}", 10), rfkill_{RFKILL_TYPE_BLUETOOTH} {
   rfkill_.on_update.connect(sigc::hide(sigc::mem_fun(*this, &Bluetooth::update)));
-  thread_ = [this] {
-    auto now = std::chrono::system_clock::now();
-    auto timeout = std::chrono::floor<std::chrono::seconds>(now + interval_);
-    auto diff = std::chrono::seconds(timeout.time_since_epoch().count() % interval_.count());
-    thread_.sleep_until(timeout - diff);
-    dp.emit();
-  };
 }
 
 auto waybar::modules::Bluetooth::update() -> void {