Remove deprecated image.fluentd.initContainer values.yaml option (#1995)

Author: dmitryax

.chloggen/remove-deprecated-initcontainer.yaml

@@ -0,0 +1,13 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+# The name of the component, or a single word describing the area of concern, (e.g. agent, clusterReceiver, gateway, operator, chart, other)
+component: chart
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove deprecated `image.fluentd.initContainer` configuration option.
+# One or more tracking issues related to the change
+issues: [1995]
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  This option was deprecated in version 0.38.0. The same splunk/fluentd-hec image is now used in init containers.

helm-charts/splunk-otel-collector/templates/NOTES.txt

@@ -19,10 +19,6 @@ Splunk OpenTelemetry Collector is installed and configured to send data to Splun
 [WARNING] The ".Values.service" config is deprecated. Please use ".Values.agent.service" and ".Values.gateway.service" for configuring services for the agent and gateway, respectively.
           This field will be removed in a future release.
 {{ end }}
-{{- if not (eq (toString .Values.image.fluentd.initContainer) "<nil>") }}
-[WARNING] "image.fluentd.initContainer" parameter is deprecated now. Now we use the same splunk/fluentd-hec image in init container.
-          Upgrade guidelines: https://github.com/signalfx/splunk-otel-collector-chart/blob/main/UPGRADING.md#0371-to-0380
-{{ end }}
 {{- if not (eq (toString .Values.clusterReceiver.k8sEventsEnabled) "<nil>") }}
 [WARNING] "clusterReceiver.k8sEventsEnabled" parameter is deprecated. Please use clusterReceiver.eventsEnabled and splunkObservability.infrastructureMonitoringEventsEnabled.
           Upgrade guidelines: https://github.com/signalfx/splunk-otel-collector-chart/blob/main/UPGRADING.md#0532-to-0540

helm-charts/splunk-otel-collector/values.schema.json

@@ -1088,10 +1088,6 @@
                 "Always",
                 "Never"
               ]
-            },
-            "initContainer": {
-              "type": "object",
-              "deprecated": true
             }
           }
         },