Remove transport version checks for task settings class

Author: DonalEvans

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/googlevertexai/completion/GoogleVertexAiChatCompletionTaskSettings.java

@@ -38,11 +38,7 @@ public GoogleVertexAiChatCompletionTaskSettings(ThinkingConfig thinkingConfig) {
     }
 
     public GoogleVertexAiChatCompletionTaskSettings(StreamInput in) throws IOException {
-        if (in.getTransportVersion().onOrAfter(TransportVersions.GEMINI_THINKING_BUDGET_ADDED)) {
-            thinkingConfig = new ThinkingConfig(in);
-        } else {
-            thinkingConfig = EMPTY_THINKING_CONFIG;
-        }
+        thinkingConfig = new ThinkingConfig(in);
     }
 
     public static GoogleVertexAiChatCompletionTaskSettings fromMap(Map<String, Object> taskSettings) {
@@ -97,9 +93,7 @@ public TransportVersion getMinimalSupportedVersion() {
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
-        if (out.getTransportVersion().onOrAfter(TransportVersions.GEMINI_THINKING_BUDGET_ADDED)) {
-            thinkingConfig.writeTo(out);
-        }
+        thinkingConfig.writeTo(out);
     }
 
     @Override

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/services/googlevertexai/completion/GoogleVertexAiChatCompletionTaskSettingsTests.java

@@ -7,8 +7,6 @@
 
 package org.elasticsearch.xpack.inference.services.googlevertexai.completion;
 
-import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.ValidationException;
 import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.xpack.inference.services.InferenceSettingsTestCase;
@@ -87,18 +85,6 @@ public void testOf_doesNotOverrideOriginalSettings_whenNewSettingsNotPresent() {
         assertThat(updatedSettings.thinkingConfig().getThinkingBudget(), is(originalThinkingBudget));
     }
 
-    @Override
-    protected GoogleVertexAiChatCompletionTaskSettings mutateInstanceForVersion(
-        GoogleVertexAiChatCompletionTaskSettings instance,
-        TransportVersion version
-    ) {
-        if (version.before(TransportVersions.GEMINI_THINKING_BUDGET_ADDED)) {
-            return new GoogleVertexAiChatCompletionTaskSettings();
-        } else {
-            return instance;
-        }
-    }
-
     @Override
     protected GoogleVertexAiChatCompletionTaskSettings fromMutableMap(Map<String, Object> mutableMap) {
         return GoogleVertexAiChatCompletionTaskSettings.fromMap(mutableMap);