tls: remove util and calls to util.format
Currently util.format is being used for string templating in tls. By replacing all of the instances of util.format with backtick string we can remove the need to require util in tls all together.
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Currently util.format is being used for string templating in tls. By replacing all of the instances of util.format with backtick string we can remove the need to require util in tls all together.