Revert "Add dummy lone hits for he channel"

This reverts commit 4710419.

straxen/plugins/peaklet_processing.py

@@ -721,10 +721,7 @@ def infer_dtype(self):
         return strax.unpack_dtype(self.deps['peaklets_he'].dtype_for('peaklets_he'))
 
     def compute(self, peaklets_he):
-        # There are not any lone hits for the high energy channel, 
-        #  so create a dummy for the compute method.
-        lone_hits = np.zeros(0, dtype=strax.hit_dtype)
-        return super().compute(peaklets_he, lone_hits)
+        return super().compute(peaklets_he)
 
 
 @export