Remove unused Heartbeat component

Author: robtaylor

chipflow_lib/platforms/silicon.py

@@ -31,44 +31,6 @@
 logger = logging.getLogger(__name__)
 
 
-def make_hashable(cls):
-    def __hash__(self):
-        return hash(id(self))
-
-    def __eq__(self, obj):
-        return id(self) == id(obj)
-
-    cls.__hash__ = __hash__
-    cls.__eq__ = __eq__
-    return cls
-
-
-HeartbeatSignature = wiring.Signature({"heartbeat_i": In(1)})
-
-
-@make_hashable
-@dataclass
-class Heartbeat(Component):
-    clock_domain: str = "sync"
-    counter_size: int = 23
-    name: str = "heartbeat"
-
-    def __init__(self, ports):
-        super().__init__(HeartbeatSignature)
-        self.ports = ports
-
-    def elaborate(self, platform):
-        m = Module()
-        # Heartbeat LED (to confirm clock/reset alive)
-        heartbeat_ctr = Signal(self.counter_size)
-        getattr(m.d, self.clock_domain).__iadd__(heartbeat_ctr.eq(heartbeat_ctr + 1))
-
-        heartbeat_buffer = io.Buffer(io.Direction.Output, self.ports.heartbeat)
-        m.submodules.heartbeat_buffer = heartbeat_buffer
-        m.d.comb += heartbeat_buffer.o.eq(heartbeat_ctr[-1])  # type: ignore
-        return m
-
-
 class SiliconPlatformPort(io.PortLike, Generic[Pin]):
     def __init__(self,
                  name: str,