Revert "Add agc reset attempt (#8163)" (#9702)

This reverts commit ac611c4b62.

src/mesh/RadioLibInterface.cpp

@@ -517,8 +517,6 @@ void RadioLibInterface::handleReceiveInterrupt()
 
 void RadioLibInterface::startReceive()
 {
-    // Note the updated timestamp, to avoid unneeded AGC resets
-    last_listen = millis();
     isReceiving = true;
     powerMon->setState(meshtastic_PowerMon_State_Lora_RXOn);
 }