Remove incorrect early guard comment

esphome/components/pylontech/pylontech.cpp

@@ -56,8 +56,6 @@ void PylontechComponent::setup() {
 void PylontechComponent::update() { this->write_str("pwr\n"); }
 
 void PylontechComponent::loop() {
-  // Early return avoids stack adjustment for the batch buffer below.
-  // loop() runs ~7000/min so most calls have nothing to read.
   int avail = this->available();
   if (avail > 0) {
     // pylontech sends a lot of data very suddenly