Watchdog: Update Interface yaml file to remove signal

Initial thought behind watchdog implementation was that when
the timer expires, it would broadcast a signal. A better design
was thought of in the meantime and that would call into a
user requested target post timer expiration.

Change-Id: Ibe148ed5cd0e8d72949324f64c87704a8e9e7236
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/xyz/openbmc_project/State/Watchdog.interface.yaml b/xyz/openbmc_project/State/Watchdog.interface.yaml
index 80da655..7ba0c1e 100644
--- a/xyz/openbmc_project/State/Watchdog.interface.yaml
+++ b/xyz/openbmc_project/State/Watchdog.interface.yaml
@@ -17,9 +17,5 @@
           Time remaining before timeout, in mili-second.
           Setting this property can re-arm the watchdog.
       default: 0
-signals:
-    - name: Timeout
-      description: >
-          Signal indicating that watchdog timed out.
 
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