Lots of studies show masks reduce the spread of airborne viruses, this is why medical personnel have been wearing masks for decades. Eliminate? No. Does the mask material and layering matter? Yes. But plenty of evidence showing high quality masks reduce spread, so I don't get people saying there is no evidence they help.HELP not STOP.
The data in the OP is presented in a way to make one think the only things changing in Hawaii were the requirement to wear masks indoors and outdoors, in reality a thinking person realizes there are always many variables. Hawaii had banned inter island travel, that ban was lifted Jun 16th. Cell phone data shows how people in Hawaii grew tired of lockdowns and started moving around prior to the case spike seen in the OP
https://www.civilbeat.org/2020/08/how-bad-is-hawaii-at-social-distancing-heres-what-the-data-shows/. There is no data that proves the extent to which residents comply with the indoor/outdoor masks edicts, and that data is more valuable than that government's stated mandate - a scientific study would require data around participation.
All that being said, Hawaii ranks 46th out of 50 states in test confirmed cases per 1 million population, and 50th out of 50 states in deaths per 1 million population. They are doing very well, despite how the OP graphs try to twist info. How many states required indoor and outdoors masking? I guess it doesnt matter, Hawaii beats all states in the most important stat - deaths per million residents.