Remove weight initialization arguments for ATSS

[wonjuleee]

Summary

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bdd_small/1	as-is	init_weight
	0.384865	0.40314135
	0.413793	0.428336084
	0.360951	0.422498375
	0.373016	0.430252105
	0.403025	0.411873847
avg	0.38713	0.419220352
pothole_medium	as-is	init_weight
	0.701639	0.70588237
	0.687943	0.680000007
	0.707395	0.687898099
	0.65233	0.69206351
	0.668731	0.684563756
avg	0.683608	0.690081549
vitens_large	as-is	init_weight
	0.768944	0.774932623
	0.762447	0.780222774
	0.773236	0.752703249
	0.739642	0.743120551
	0.783075	0.783074737
avg	0.765469	0.766810787

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have ran e2e tests and there is no issues.
• I have added the description of my changes into CHANGELOG in my target branch (e.g., CHANGELOG in develop).​
• I have updated the documentation in my target branch accordingly (e.g., documentation in develop).
• I have linked related issues.

License

• I submit my code changes under the same Apache License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2024 Intel Corporation
# SPDX-License-Identifier: Apache-2.0