[core] Remove leftover -O2 attributes (writer.py loop, host/zephyr main)

esphome/components/host/core.cpp

@@ -77,8 +77,7 @@ uint32_t arch_get_cpu_freq_hz() { return 1000000000U; }
 
 void setup();
 void loop();
-int __attribute__((optimize("O2")))  // NOLINT(clang-diagnostic-unknown-attributes)
-main() {
+int main() {
   // Install signal handlers for graceful shutdown (flushes preferences to disk)
   std::signal(SIGINT, signal_handler);
   std::signal(SIGTERM, signal_handler);

esphome/components/zephyr/core.cpp

@@ -95,8 +95,7 @@ void get_mac_address_raw(uint8_t *mac) {  // NOLINT(readability-non-const-parame
 void setup();
 void loop();
 
-int __attribute__((optimize("O2")))  // NOLINT(clang-diagnostic-unknown-attributes)
-main() {
+int main() {
   setup();
   while (true) {
     loop();

esphome/writer.py

@@ -45,7 +45,7 @@ void setup() {
   App.setup();
 }
 
-void __attribute__((optimize("O2"))) loop() {
+void loop() {
   App.loop();
 }
 """,