refactor: avoid tempdir workaround in notice script

[kruskall]

Go 1.17 added a new syntax for 'go run' to execute specific
versions without installing the binary.

See See https://tip.golang.org/doc/go1.17#go%20run

Remove the tempdir creation and removal and cleanup the notice
script.

[ghost]

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• Start Time: 2022-07-16T21:29:05.836+0000

• Duration: 8 min 17 sec

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