[Callbacks] Remove EventLifecycle and on_start event

src/llmcompressor/core/__init__.py

@@ -1,10 +1,4 @@
-from llmcompressor.core.events import (
-    CallbacksEventLifecycle,
-    Event,
-    EventLifecycle,
-    EventType,
-    OptimizerEventLifecycle,
-)
+from llmcompressor.core.events import Event, EventType
 from llmcompressor.core.lifecycle import CompressionLifecycle
 from llmcompressor.core.model_layer import ModelParameterizedLayer
 from llmcompressor.core.session import CompressionSession
@@ -22,9 +16,6 @@
 __all__ = [
     "Event",
     "EventType",
-    "EventLifecycle",
-    "CallbacksEventLifecycle",
-    "OptimizerEventLifecycle",
     "State",
     "Data",
     "Hardware",

src/llmcompressor/core/events/__init__.py

@@ -8,14 +8,5 @@
 """
 
 from .event import Event, EventType
-from .event_lifecycle import EventLifecycle
-from .lifecycle_callbacks import CallbacksEventLifecycle
-from .lifecycle_optimizer import OptimizerEventLifecycle
 
-__all__ = [
-    "Event",
-    "EventType",
-    "EventLifecycle",
-    "CallbacksEventLifecycle",
-    "OptimizerEventLifecycle",
-]
+__all__ = ["Event", "EventType"]