diff --git a/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339InstantDeserializer.java b/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339InstantDeserializer.java
deleted file mode 100644
index 760b0cfb28d2..000000000000
--- a/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339InstantDeserializer.java
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * OpenAPI Petstore
- * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
- *
- * The version of the OpenAPI document: 1.0.0
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- */
-
-package org.openapitools.client;
-
-import java.io.IOException;
-import java.time.Instant;
-import java.time.OffsetDateTime;
-import java.time.ZoneId;
-import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
-import java.time.temporal.Temporal;
-import java.time.temporal.TemporalAccessor;
-import java.util.function.BiFunction;
-import java.util.function.Function;
-
-import com.fasterxml.jackson.core.JsonParser;
-import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.datatype.jsr310.JavaTimeFeature;
-import com.fasterxml.jackson.datatype.jsr310.deser.InstantDeserializer;
-
-@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen", comments = "Generator version: 7.26.0-SNAPSHOT")
-public class RFC3339InstantDeserializer<T extends Temporal> extends InstantDeserializer<T> {
-    private static final long serialVersionUID = 1L;
-    private final static boolean DEFAULT_NORMALIZE_ZONE_ID = JavaTimeFeature.NORMALIZE_DESERIALIZED_ZONE_ID.enabledByDefault();
-    private final static boolean DEFAULT_ALWAYS_ALLOW_STRINGIFIED_DATE_TIMESTAMPS
-    = JavaTimeFeature.ALWAYS_ALLOW_STRINGIFIED_DATE_TIMESTAMPS.enabledByDefault();
-
-    public static final RFC3339InstantDeserializer<Instant> INSTANT = new RFC3339InstantDeserializer<>(
-        Instant.class, DateTimeFormatter.ISO_INSTANT,
-        Instant::from,
-        a -> Instant.ofEpochMilli( a.value ),
-        a -> Instant.ofEpochSecond( a.integer, a.fraction ),
-        null,
-        true, // yes, replace zero offset with Z
-        DEFAULT_NORMALIZE_ZONE_ID,
-        DEFAULT_ALWAYS_ALLOW_STRINGIFIED_DATE_TIMESTAMPS
-    );
-
-    public static final RFC3339InstantDeserializer<OffsetDateTime> OFFSET_DATE_TIME = new RFC3339InstantDeserializer<>(
-        OffsetDateTime.class, DateTimeFormatter.ISO_OFFSET_DATE_TIME,
-        OffsetDateTime::from,
-        a -> OffsetDateTime.ofInstant( Instant.ofEpochMilli( a.value ), a.zoneId ),
-        a -> OffsetDateTime.ofInstant( Instant.ofEpochSecond( a.integer, a.fraction ), a.zoneId ),
-        (d, z) -> ( d.isEqual( OffsetDateTime.MIN ) || d.isEqual( OffsetDateTime.MAX ) ?
-        d :
-        d.withOffsetSameInstant( z.getRules().getOffset( d.toLocalDateTime() ) ) ),
-        true, // yes, replace zero offset with Z
-        DEFAULT_NORMALIZE_ZONE_ID,
-        DEFAULT_ALWAYS_ALLOW_STRINGIFIED_DATE_TIMESTAMPS
-    );
-
-    public static final RFC3339InstantDeserializer<ZonedDateTime> ZONED_DATE_TIME = new RFC3339InstantDeserializer<>(
-        ZonedDateTime.class, DateTimeFormatter.ISO_ZONED_DATE_TIME,
-        ZonedDateTime::from,
-        a -> ZonedDateTime.ofInstant( Instant.ofEpochMilli( a.value ), a.zoneId ),
-        a -> ZonedDateTime.ofInstant( Instant.ofEpochSecond( a.integer, a.fraction ), a.zoneId ),
-        ZonedDateTime::withZoneSameInstant,
-        false, // keep zero offset and Z separate since zones explicitly supported
-        DEFAULT_NORMALIZE_ZONE_ID,
-        DEFAULT_ALWAYS_ALLOW_STRINGIFIED_DATE_TIMESTAMPS
-    );
-
-    protected RFC3339InstantDeserializer(
-            Class<T> supportedType,
-            DateTimeFormatter formatter,
-            Function<TemporalAccessor, T> parsedToValue,
-            Function<FromIntegerArguments, T> fromMilliseconds,
-            Function<FromDecimalArguments, T> fromNanoseconds,
-            BiFunction<T, ZoneId, T> adjust,
-            boolean replaceZeroOffsetAsZ,
-            boolean normalizeZoneId,
-            boolean readNumericStringsAsTimestamp) {
-        super(
-                supportedType,
-                formatter,
-                parsedToValue,
-                fromMilliseconds,
-                fromNanoseconds,
-                adjust,
-                replaceZeroOffsetAsZ,
-                normalizeZoneId,
-                readNumericStringsAsTimestamp
-        );
-    }
-
-    @Override
-    protected T _fromString(JsonParser p, DeserializationContext ctxt, String string0) throws IOException {
-        return super._fromString(p, ctxt, string0.replace( ' ', 'T' ));
-    }
-}
\ No newline at end of file
diff --git a/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339JavaTimeModule.java b/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339JavaTimeModule.java
deleted file mode 100644
index d3a0e3052a2b..000000000000
--- a/samples/client/petstore/java/rest-assured-jackson3/src/main/java/org/openapitools/client/RFC3339JavaTimeModule.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * OpenAPI Petstore
- * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
- *
- * The version of the OpenAPI document: 1.0.0
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- */
-
-package org.openapitools.client;
-
-import java.time.Instant;
-import java.time.OffsetDateTime;
-import java.time.ZonedDateTime;
-
-import com.fasterxml.jackson.databind.module.SimpleModule;
-import com.fasterxml.jackson.databind.Module.SetupContext;
-
-@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen", comments = "Generator version: 7.26.0-SNAPSHOT")
-public class RFC3339JavaTimeModule extends SimpleModule {
-    private static final long serialVersionUID = 1L;
-
-    public RFC3339JavaTimeModule() {
-        super("RFC3339JavaTimeModule");
-    }
-
-   @Override
-   public void setupModule(SetupContext context) {
-       super.setupModule(context);
-
-       addDeserializer(Instant.class, RFC3339InstantDeserializer.INSTANT);
-       addDeserializer(OffsetDateTime.class, RFC3339InstantDeserializer.OFFSET_DATE_TIME);
-       addDeserializer(ZonedDateTime.class, RFC3339InstantDeserializer.ZONED_DATE_TIME);
-   }
-
-}