🐛 Turn on the amphtml-internal/unused-private-field
rule, fix errors
#22626
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#15075 added a new lint rule called
amphtml-internal/unused-private-field
to ensure that all private class fields are correctly annotated. Since then, the rule has sat around for a while in warning mode and then gotten turned off.This PR re-enables the rule and updates annotations that aren't supposed to be
@private
.Note: Most of the annotations I've changed are obviously supposed to be
@protected
,@restricted
, or@visibleForTesting
. However, a small handful of fields are either not being used anywhere, or are being exposed to external code in some way. In the interest of not touching code, I've gone ahead and marked them@protected
. (/cc @jridgewell)Fixes #14742