Remove dependency on package:intl

[mosuem]

As I assume the datetime strings need not be localized. If they should be, then ignore this PR, and we should change the documentation instead.

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[github-actions]

PR Health

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
unified_analytics	Non-Breaking	6.1.3	6.1.4-wip	6.1.4	✔️

Changelog Entry ✔️

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

Coverage ⚠️

File	Coverage
pkgs/unified_analytics/lib/src/analytics.dart	💚 72 %
pkgs/unified_analytics/lib/src/config_handler.dart	💚 94 %
pkgs/unified_analytics/lib/src/constants.dart	💔 Not covered
pkgs/unified_analytics/lib/src/utils.dart	💚 88 %

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API leaks ⚠️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbols
unified_analytics	Condition PersistedSurvey GAClient UserProperty

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Package publish validation ✔️

Package	Version	Status
package:cli_config	0.2.1-wip	WIP (no publish necessary)
package:coverage	1.9.2	already published at pub.dev
package:extension_discovery	2.0.1-wip	WIP (no publish necessary)
package:graphs	2.3.3-wip	WIP (no publish necessary)
package:mime	2.0.0-wip	WIP (no publish necessary)
package:oauth2	2.0.4-wip	WIP (no publish necessary)
package:source_map_stack_trace	2.1.3-wip	WIP (no publish necessary)
package:unified_analytics	6.1.4-wip	WIP (no publish necessary)

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[devoncarew]

Is there tooling supporting these style comments?

[mosuem]

No, not yet (I see this as a feature request to the PR health bot ;) )

I wrote this just for more visual noise, as I overlooked this at first and thought this might help with this not happening again.