docs: remove old observability and orchestrate get-started guides

.github/actions/spelling/excludes.txt

@@ -1,31 +1,31 @@
 (?:^|/)(?i)LICENSE
 /package-lock\.json$
 /swagger-ui/
-CODEOWNERS
-CONTRIBUTORS.md
-CHANGELOG.md
-ignore$
 \.editorconfig$
+\.gif$
 \.gitkeep$
+\.ico$
+\.jpg$
 \.map$
 \.mod$
 \.npmrc$
 \.png$
-\.jpg$
-\.ttf$
 \.sav$
 \.sum$
-\.xlf$
 \.svg$
-\.ico$
+\.ttf$
+\.xlf$
 \.zip$
-\.gif$
 ^\.github/actions/spelling
-_test\.go$
-^examples/support/observability/config/
-^examples/support/observability/assets/
-^test/prometheus/
 ^\.github/scripts/\.helm-tests/[a-zA-Z0-9-]+/result.ya?ml
+^\Qdocs/layouts/partials/hooks/body-end.html\E$
 ^dashboards/grafana/configmap/.*\.ya?ml
 ^dashboards/grafana/import/.*\.json
-^\Qdocs/layouts/partials/hooks/body-end.html\E$
+^examples/support/observability/assets/
+^examples/support/observability/config/
+^test/prometheus/
+_test\.go$
+CHANGELOG.md
+CODEOWNERS
+CONTRIBUTORS.md
+ignore$

docs/content/en/_index.md

@@ -46,9 +46,9 @@ cascade:
 </div>
 <div class="usecasebox">
 
-## Use Cases
+## Use cases
 
-We extend the K8s APIs with the following Use Cases:
+We extend the K8s APIs with the following use cases:
 
 <div class="row usecases">
 {{% blocks/feature icon="home homeobservability" title="Deployment Observability" %}}

docs/content/en/docs/core-concepts/_index.md

@@ -1,6 +1,6 @@
 ---
 title: Core Concepts
-description: An introduction to Keptn and the usecases.
+description: An introduction to Keptn and the use cases.
 weight: 10
 ---
 
@@ -68,8 +68,8 @@ deployment durations and failures across multiple deployment strategies.
   [DORA metrics](../guides/dora.md)
   and exposes them as OpenTelemetry metrics out of the box.
 
-* Reports traces and custom Keptn metrics from configured data providers
-   using OpenTelemetry.
+* Uses OpenTelemetry to Report traces and custom Keptn metrics
+  from all data providers that are configured in your cluster.
 
 * Enables monitoring of new logs from log monitoring solutions.
 
@@ -87,7 +87,6 @@ to ensure that your deployments are observable.
 To learn more, see:
 
 * [Getting started with Keptn Observability](../getting-started/observability.md)
-* [Standardize observability](usecase-observability.md/)
 * [DORA metrics](../guides/dora.md) User Guide
 * [OpenTelemetry observability](../guides/otel.md) User Guide
 
@@ -137,5 +136,4 @@ For more information, see:
 * [Getting started with release lifecycle management](../getting-started/lifecycle-management.md)
 * [Deployment tasks](../guides/tasks.md) User Guide
 * [Evaluations](../guides/evaluations.md) User Guide
-* [Manage release lifecycle](usecase-orchestrate.md)
 * [KeptnApp and KeptnWorkload resources](../components/lifecycle-operator/keptn-apps.md)