[shelly] Remove broken images (openhab#14007)

See also openhab#13993

Signed-off-by: Wouter Born <github@maindrain.net>

bundles/org.openhab.binding.shelly/README.md

@@ -2,8 +2,6 @@
 
 This Binding integrates [Shelly devices](https://shelly.cloud) devloped by Allterco.
 
-![shelly 1](https://shop.shelly.cloud/image/cache/catalog/shelly_1/s1_x1-80x80.jpg) ![shelly dimmer 2](https://shop.shelly.cloud/image/cache/catalog/shelly_dimmer2/shelly_dimmer2_x1-80x80.jpg) ![shelly vintage a60](https://shop.shelly.cloud/image/cache/catalog/shelly_vintage/shelly_vintage_A60-80x80.jpg) ![shelly plug s](https://shop.shelly.cloud/image/cache/catalog/shelly_plug_s/s_plug_s_x1-80x80.jpg) ![shelly button 1](https://shop.shelly.cloud/image/cache/catalog/shelly_button1/shelly_button1_x1-80x80.jpg) ![shelly gas eu](https://shop.shelly.cloud/image/cache/catalog/shelly_gas/shelly_gas_eu-80x80.jpg) ![shelly ht](https://shop.shelly.cloud/image/cache/catalog/shelly_ht/s_ht_x1-80x80.jpg)
-
 Allterco provides a rich set of smart home devices. All of them are WiFi enabled (2,4GHz, IPv4 only) and provide a documented API.
 The binding is officially acknowledged by Allterco and openHAB is listed as a reference and directly supports the openHAB community.