remove overwrite in compressed

Author: Baunsgaard

src/main/java/org/apache/sysds/runtime/frame/data/columns/ACompressedArray.java

@@ -19,12 +19,8 @@
 
 package org.apache.sysds.runtime.frame.data.columns;
 
-import java.util.Map;
-
-import org.apache.commons.lang3.NotImplementedException;
 import org.apache.sysds.common.Types.ValueType;
 import org.apache.sysds.runtime.compress.DMLCompressionException;
-import org.apache.sysds.runtime.compress.colgroup.mapping.AMapToData;
 import org.apache.sysds.runtime.frame.data.compress.ArrayCompressionStatistics;
 
 /**
@@ -153,14 +149,4 @@ protected Array<Object> changeTypeHash64(Array<Object> retA, int l, int u) {
 	protected Array<Object> changeTypeHash32(Array<Object> ret, int l, int u) {
 		throw new DMLCompressionException("Invalid to change sub compressed array");
 	}
-
-	// @Override
-	// public void setM(Map<T, Integer> map, AMapToData m, int i) {
-	// 	throw new NotImplementedException();
-	// }
-
-	// @Override
-	// public void setM(Map<T, Integer> map, int si, AMapToData m, int i) {
-	// 	throw new NotImplementedException();
-	// }
 }