fix: remove deprecated config_entry assignment in OptionsFlow

HA 2024.11+ auto-injects config_entry into OptionsFlow instances.
Remove manual __init__ and stop passing config_entry to the constructor
to eliminate deprecation warnings on modern HA versions.

Follows upstream PR tsunglung#25.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: omegaatt36

custom_components/opencwb/config_flow.py

@@ -39,7 +39,7 @@ class OpenCWBConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     @callback
     def async_get_options_flow(config_entry):
         """Get the options flow for this handler."""
-        return OpenCWBOptionsFlow(config_entry)
+        return OpenCWBOptionsFlow()
 
     async def async_step_user(self, user_input=None):
         """Handle a flow initialized by the user."""
@@ -113,11 +113,6 @@ async def async_step_user(self, user_input=None):
 class OpenCWBOptionsFlow(config_entries.OptionsFlow):
     """Handle options."""
 
-    def __init__(self, config_entry):
-        """Initialize options flow."""
-        if (MAJOR_VERSION, MINOR_VERSION) < (2024, 11):
-            self.config_entry = config_entry
-
     async def async_step_init(self, user_input=None):
         """Manage the options."""
         if user_input is not None: