watchdog: Remove sysmobts-2050 configuration file

The sysmobts-2050 machine does inherit from the generic bts so
we do not need an exact copy of the configuration file.

The watchdog is not used in dora or later images as this functionality
is integrated into the systemd.

Related: SYS#559

recipes-bsp/watchdog/watchdog/sysmobts-2050/watchdog.conf

@@ -1,41 +0,0 @@
-#ping			= 172.31.14.1
-#ping			= 172.26.1.255
-#interface		= eth0
-#file			= /var/log/messages
-#change			= 1407
-
-# Uncomment to enable test. Setting one of these values to '0' disables it.
-# These values will hopefully never reboot your machine during normal use
-# (if your machine is really hung, the loadavg will go much higher than 25)
-#max-load-1		= 24
-#max-load-5		= 18
-#max-load-15		= 12
-
-# Note that this is the number of pages!
-# To get the real size, check how large the pagesize is on your machine.
-#min-memory		= 1
-
-#repair-binary		= /usr/sbin/repair
-#repair-timeout		= 
-#test-binary		= 
-#test-timeout		= 
-
-watchdog-device	= /dev/watchdog
-
-# Defaults compiled into the binary
-#temperature-device	=
-#max-temperature	= 120
-
-# Defaults compiled into the binary
-#admin			= root
-#interval		= 1
-#logtick                = 1
-#log-dir		= /var/log/watchdog
-
-# This greatly decreases the chance that watchdog won't be scheduled before
-# your machine is really loaded
-realtime		= yes
-priority		= 1
-
-# Check if syslogd is still running by enabling the following line
-#pidfile