Remove several README embedded logos (#13089)

Signed-off-by: Michael Lobstein <michael.lobstein@gmail.com>

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

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 # Kaleidescape Binding
 
-![Kaleidescape logo](doc/Kaleidescape_Logo.png)
-
 This binding is used to control and retrieve information from a Kaleidescape movie player.
 All movie player components including the original K-Player series, M Class Players, Cinema One, Alto, and Strato are supported.
 The 4 zone audio only KMUSIC-4000 is not supported at this time.

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

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 # RadioThermostat Binding
 
-![RadioThermostat logo](doc/index.jpg)
-
 This binding connects RadioThermostat/3M Filtrete models CT30, CT50/3M50, CT80, etc. with built-in Wi-Fi module to openHAB. 
 Thermostats using a Z-Wave module are not supported but can be used via the openHAB ZWave binding.
 

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

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 # TiVo Binding
 
-![TiVo Logo](doc/TiVo_lockup_BLK.png)
-
 This binding controls a [TiVo](https://www.tivo.com/) Digital Video Recorder (DVR) that supports the TiVo TCP Control Protocol v1.1 (see TiVo_TCP_Network_Remote_Control_Protocol.pdf).
 
 ## Supported Things