Removed matched text from chunk

Author: Mikep86

server/src/main/java/org/elasticsearch/inference/ChunkedInference.java

@@ -26,13 +26,11 @@ public interface ChunkedInference {
     Iterator<Chunk> chunksAsMatchedTextAndByteReference(XContent xcontent) throws IOException;
 
     /**
-     * A chunk of inference results containing matched text, the substring location
-     * in the original text and the bytes reference.
-     * @param matchedText
+     * A chunk of inference results containing the substring location in the original text and the bytes reference.
      * @param textOffset
      * @param bytesReference
      */
-    record Chunk(String matchedText, TextOffset textOffset, BytesReference bytesReference) {}
+    record Chunk(TextOffset textOffset, BytesReference bytesReference) {}
 
     record TextOffset(int start, int end) {}
 }

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/inference/results/SparseEmbeddingResults.java

@@ -185,7 +185,7 @@ public record Chunk(List<WeightedToken> weightedTokens, String matchedText, Chun
             EmbeddingResults.Chunk {
 
         public ChunkedInference.Chunk toChunk(XContent xcontent) throws IOException {
-            return new ChunkedInference.Chunk(matchedText, offset, toBytesReference(xcontent, weightedTokens));
+            return new ChunkedInference.Chunk(offset, toBytesReference(xcontent, weightedTokens));
         }
 
         private static BytesReference toBytesReference(XContent xContent, List<WeightedToken> tokens) throws IOException {

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/inference/results/TextEmbeddingByteResults.java

@@ -198,7 +198,7 @@ public Chunk toChunk(String text, ChunkedInference.TextOffset offset) {
     public record Chunk(byte[] embedding, String matchedText, ChunkedInference.TextOffset offset) implements EmbeddingResults.Chunk {
 
         public ChunkedInference.Chunk toChunk(XContent xcontent) throws IOException {
-            return new ChunkedInference.Chunk(matchedText, offset, toBytesReference(xcontent, embedding));
+            return new ChunkedInference.Chunk(offset, toBytesReference(xcontent, embedding));
         }
 
         private static BytesReference toBytesReference(XContent xContent, byte[] value) throws IOException {

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/inference/results/TextEmbeddingFloatResults.java

@@ -229,7 +229,7 @@ public Chunk toChunk(String text, ChunkedInference.TextOffset offset) {
     public record Chunk(float[] embedding, String matchedText, ChunkedInference.TextOffset offset) implements EmbeddingResults.Chunk {
 
         public ChunkedInference.Chunk toChunk(XContent xcontent) throws IOException {
-            return new ChunkedInference.Chunk(matchedText, offset, toBytesReference(xcontent, embedding));
+            return new ChunkedInference.Chunk(offset, toBytesReference(xcontent, embedding));
         }
 
         /**