bluetooth: rpc: remove unnecessary source

The bluetooth shell has been refactored (see
bf897cf), so the sourced file no longer
exists. Note that it was actually a bad use of sourcing, as the upstream
options are already part of the Kconfig tree (unless I missed
something).

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

subsys/bluetooth/rpc/Kconfig

@@ -184,6 +184,5 @@ source "$(ZEPHYR_BASE)/subsys/bluetooth/services/Kconfig"
 source "$(ZEPHYR_BASE)/subsys/bluetooth/common/Kconfig"
 source "$(ZEPHYR_BASE)/subsys/bluetooth/host/Kconfig"
 source "$(ZEPHYR_BASE)/subsys/bluetooth/crypto/Kconfig"
-source "$(ZEPHYR_BASE)/subsys/bluetooth/shell/Kconfig"
 
 endif # BT_RPC_STACK