Revert "Add style class for CPU state"

include/modules/cpu.hpp

@@ -22,7 +22,6 @@ class Cpu : public ALabel {
 
  private:
   std::vector<std::tuple<size_t, size_t>> prev_times_;
-  std::string prev_state_;
 
   util::SleeperThread thread_;
 };

man/waybar-cpu.5.scd

@@ -121,5 +121,3 @@ CPU usage per core rendered as icons:
 # STYLE
 
 - *#cpu*
-- *#cpu.<state>*
-	- *<state>* can be defined in the *config*. For more information see *states*.

src/modules/cpu.cpp

@@ -36,12 +36,6 @@ auto waybar::modules::Cpu::update() -> void {
     format = config_["format-" + state].asString();
   }
 
-  if (!prev_state_.empty()) {
-    label_.get_style_context()->remove_class(prev_state_);
-  }
-  label_.get_style_context()->add_class(state);
-  prev_state_ = state;
-
   if (format.empty()) {
     event_box_.hide();
   } else {