start-proxy: Remove unusued proxy_password input #6393

Job	Run time
Packaging: Config file (ubuntu-latest, default)	1m 10s
Packaging: Config file (windows-latest, linked)	6m 33s
Packaging: Config file (macos-latest, linked)	1m 31s
Packaging: Config file (ubuntu-latest, linked)	1m 0s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 10s
Packaging: Config file (windows-latest, default)	6m 7s
Packaging: Config file (macos-latest, default)	1m 39s
Packaging: Config file (macos-latest, nightly-latest)	1m 20s
Packaging: Config file (windows-latest, nightly-latest)	7m 58s
	28m 28s

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