do nothing on Init gate instead of warning (#166)

* do nothing on init gate instead of showing a warning in adjust_transport_time()

pytket/phir/phirgen_parallel.py

@@ -280,33 +280,31 @@ def format_and_add_primary_commands(
             groups2qops(fmt_g2q, ops)
 
 
+def get_transport_time_for_gate(gate: str, machine: "Machine") -> float:
+    """Return the transport time on the machine for the given gate type."""
+    match gate:
+        case "RZ" | "R1XY":
+            return machine.sq_time
+        case "RZZ":
+            return machine.tq_time
+        case "Measure":
+            return machine.meas_prep_time
+        case "Init":
+            return 0
+        case _:
+            logger.warning("Gate type %s not assigned a transport duration", gate)
+            return 0
+
+
 def adjust_phir_transport_time(ops: list["JsonDict"], machine: "Machine") -> None:
     """Analyze the generated phir and adjust the transport time."""
     adjustment = 0.0
     for op in ops:
         if "qop" in op:
-            match op["qop"]:
-                case "RZ" | "R1XY":
-                    adjustment += machine.sq_time
-                case "RZZ":
-                    adjustment += machine.tq_time
-                case "Measure":
-                    adjustment += machine.meas_prep_time
-                case _:
-                    logger.warning(
-                        "Gate type %s not assigned a transport duration", op["qop"]
-                    )
+            adjustment += get_transport_time_for_gate(op["qop"], machine)
         if "block" in op and op["block"] == "qparallel":
             first_op = op["ops"][0]["qop"]
-            match first_op:
-                case "RZ" | "R1XY":
-                    adjustment += machine.sq_time
-                case "RZZ":
-                    adjustment += machine.tq_time
-                case _:
-                    logger.warning(
-                        "Gate type %s not assigned a transport duration", first_op
-                    )
+            adjustment += get_transport_time_for_gate(first_op, machine)
         if "mop" in op and op["mop"] == "Transport":
             cost, units = op["duration"]
             op["duration"] = cost + adjustment, units