Remove unused

src/main/java/com/nvidia/spark/rapids/jni/TableUtils.java

@@ -1,7 +1,5 @@
 package com.nvidia.spark.rapids.jni;
 
-import ai.rapids.cudf.*;
-
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.function.Function;
@@ -10,51 +8,6 @@
 import java.util.stream.Collectors;
 
 public class TableUtils {
-  public static Schema schemaOf(Table t) {
-    Schema.Builder builder = Schema.builder();
-
-    for (int i = 0; i < t.getNumberOfColumns(); i++) {
-      ColumnVector cv = t.getColumn(i);
-      addToSchema(cv, "col_" + i + "_", builder);
-    }
-
-    return builder.build();
-  }
-
-  public static void addToSchema(ColumnView cv, String namePrefix, Schema.Builder builder) {
-    toSchemaInner(cv, 0, namePrefix, builder);
-  }
-
-  private static int toSchemaInner(ColumnView cv, int idx, String namePrefix,
-      Schema.Builder builder) {
-    String name = namePrefix + idx;
-
-    Schema.Builder thisBuilder = builder.addColumn(cv.getType(), name);
-    int lastIdx = idx;
-    for (int i = 0; i < cv.getNumChildren(); i++) {
-      lastIdx = toSchemaInner(cv.getChildColumnView(i), lastIdx + 1, namePrefix,
-          thisBuilder);
-    }
-
-    return lastIdx;
-  }
-
-  public static void addToSchema(HostColumnVectorCore cv, String namePrefix, Schema.Builder builder) {
-    toSchemaInner(cv, 0, namePrefix, builder);
-  }
-
-  private static int toSchemaInner(HostColumnVectorCore cv, int idx, String namePrefix,
-      Schema.Builder builder) {
-    String name = namePrefix + idx;
-
-    Schema.Builder thisBuilder = builder.addColumn(cv.getType(), name);
-    int lastIdx = idx;
-    for (int i=0; i < cv.getNumChildren(); i++) {
-      lastIdx = toSchemaInner(cv.getChildColumnView(i), lastIdx + 1, namePrefix, thisBuilder);
-    }
-
-    return lastIdx;
-  }
 
   public static void ensure(boolean condition, String message) {
     if (!condition) {
@@ -78,17 +31,6 @@ public static long getValidityLengthInBytes(long rows) {
     return (rows + 7) / 8;
   }
 
-  /**
-   * This method returns the allocation size of the validity vector which is 64-byte aligned
-   * e.g. getValidityAllocationSizeInBytes(5) => 64 bytes
-   * getValidityAllocationSizeInBytes(14) => 64 bytes
-   * getValidityAllocationSizeInBytes(65) => 128 bytes
-   */
-  static long getValidityAllocationSizeInBytes(long rows) {
-    long numBytes = getValidityLengthInBytes(rows);
-    return ((numBytes + 63) / 64) * 64;
-  }
-
   public static <R extends AutoCloseable, T> T closeIfException(R resource, Function<R, T> function) {
     try {
       return function.apply(resource);