[FIX][HH] correct proxy agent initialization as it now uses proxy-from-env

[hermawan-hadi]

correct proxy agent initialization

[Gyunikuchan]

1. May I check if the reading proxy of env vars was tested?
2. If so, may I also get your help to clean it up by removing the const proxyConfig = getProxyConfig();, the associated code and comments?

[hermawan-hadi]

i tested it when i raised this in jul.

to clarify, our team do not use this feature and i only update the constructor as its signature changed in the new major version. i update it from the old version as there was a 9.8/10 vuln tied it. the constructor still can takes the args but the recommended way is through env var which is how its originally set.

the const proxyConfig = getProxyConfig(); is still used as proxyConfig decides if proxyagent will be created and attached it to the axios instance.