remove debug line

Author: lanking520

scala-package/core/src/main/scala/org/apache/mxnet/SparseNDArray.scala

@@ -152,31 +152,26 @@ class SparseNDArray private[mxnet] (override private[mxnet] val handle: NDArrayH
   }
 
   override def slice(start: Int, end: Int): NDArray = {
-    printf(s"\n\nSlice being called!!\n\nstart:$start end:$end")
     NDArray.api.slice(this, Shape(start), Shape(end))
   }
 
   /**
-    * Get the Data portion from the row Sparse NDArray
+    * Get the Data portion from a Row Sparse NDArray
     * @return NDArray
     */
   def getData: NDArray = {
+    require(this.sparseFormat == SparseFormat.ROW_SPARSE, "Not Supported for CSR")
     val handle = new NDArrayHandleRef
-    if (this.sparseFormat == SparseFormat.CSR) {
-      throw new UnsupportedOperationException("Not Supported for CSR")
-    }
     _LIB.mxNDArrayGetDataNDArray(this.handle, handle)
     new NDArray(handle.value, false)
   }
 
   /**
-    * Get the indptr Array
+    * Get the indptr Array from a CSR NDArray
     * @return NDArray
     */
   def getIndptr: NDArray = {
-    if (this.sparseFormat == SparseFormat.ROW_SPARSE) {
-      throw new UnsupportedOperationException("Not Supported for row sparse")
-    }
+    require(this.sparseFormat == SparseFormat.CSR, "Not Supported for row sparse")
     getAuxNDArray(0)
   }