chore: tidy-up licenses

[ematipico]

Summary

This PR removes all the ROME_LICENSE and RSLINT_LICENSE files, and moves the attributions of the license inside the LICENSE files

Test Plan

[github-actions]

Parser conformance results on

js/262

Test result	main count	This PR count	Difference
Total	48320	48320	0
Passed	47123	47123	0
Failed	1197	1197	0
Panics	0	0	0
Coverage	97.52%	97.52%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6547	6547	0
Passed	2201	2201	0
Failed	4346	4346	0
Panics	0	0	0
Coverage	33.62%	33.62%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	669	669	0
Passed	597	597	0
Failed	72	72	0
Panics	0	0	0
Coverage	89.24%	89.24%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	18265	18265	0
Passed	14001	14001	0
Failed	4264	4264	0
Panics	0	0	0
Coverage	76.65%	76.65%	0.00%