Get rid of unnecessary example config values

.env.example

@@ -45,9 +45,3 @@ MESHTENDER_RP_ORIGIN=http://localhost:8080
 #   mkcert -cert-file ./certs/dev.pem -key-file ./certs/dev-key.pem "*.leighthaus.dev" leighthaus.dev
 # MESHTENDER_TLS_CERT=./certs/dev.pem
 # MESHTENDER_TLS_KEY=./certs/dev-key.pem
-
-# Default LoRa radio params suggested when adding a repeater (EU 869.525 / 250k / SF11 / CR5).
-MESHTENDER_RADIO_FREQ_HZ=869525000
-MESHTENDER_RADIO_BW_HZ=250000
-MESHTENDER_RADIO_SF=11
-MESHTENDER_RADIO_CR=5