drivers/console: Removing left-over cmake directive about telnet

Telnet console was move as a shell backend and is not anymore part of
console drivers.

Signed-off-by: Tomasz Bursztyka <[email protected]>

Author: Tomasz Bursztyka

drivers/console/CMakeLists.txt

@@ -7,6 +7,5 @@ zephyr_sources_if_kconfig(ipm_console_receiver.c)
 zephyr_sources_if_kconfig(ipm_console_sender.c)
 zephyr_sources_if_kconfig(uart_mcumgr.c)
 zephyr_sources_if_kconfig(uart_pipe.c)
-zephyr_sources_if_kconfig(telnet_console.c)
 zephyr_sources_if_kconfig(xtensa_sim_console.c)
 zephyr_sources_if_kconfig(native_posix_console.c)