This release removes all previously deprecated features, resulting in the breaking changes listed below. As this is v1.0.0, semantic versioning applies from now on, with the exception of the API client and parts marked explicitly as experimental.

• [CHANGE] Remove objectives from the default Summary. (Objectives have to be set explicitly in the SummaryOpts.) #600
• [CHANGE] Remove all HTTP related feature in the prometheus package. (Use the promhttp package instead.) #600
• [CHANGE] Remove push.FromGatherer, push.AddFromGatherer, push.Collectors. (Use push.New instead.) #600
• [CHANGE] API client: Pass warnings through on non-error responses. #599
• [CHANGE] API client: Add warnings to Series call. #603
• [FEATURE] Make process collector work on Microsoft Windows. EXPERIMENTAL #596
• [FEATURE] API client: Add /labels call. #604
• [BUGFIX] Make AlreadyRegisteredError usable for wrapped registries. #607