replace the new step_delay function with delay(x,1), which worked pre…

…viously for recurrent nets

Signed-off-by: Jonathan Timcheck <jonathan.timcheck@intel.com>

src/lava/lib/dl/slayer/block/base.py

@@ -1478,7 +1478,7 @@ def forward(self, x):
         self.spike_state = spike.clone().detach().reshape(z.shape[:-1])
 
         if self.delay_shift is True:
-            x = step_delay(self, x)
+            x = delay(x, 1)
         if self.delay is not None:
             x = self.delay(x)