[MINOR] Cleanup code quality (tab formatting, method annotations)

Author: mboehm7

src/main/java/org/apache/sysds/hops/cost/CostEstimatorStaticRuntime.java

@@ -62,7 +62,6 @@ public class CostEstimatorStaticRuntime extends CostEstimator
 	private static final double DEFAULT_MBS_HDFSWRITE_TEXT_SPARSE = 30;
 
 	@Override
-	@SuppressWarnings("unused")
 	protected double getCPInstTimeEstimate( Instruction inst, VarStats[] vs, String[] args )
 	{
 		CPInstruction cpinst = (CPInstruction)inst;

src/main/java/org/apache/sysds/resource/cost/CPCostUtils.java

@@ -29,37 +29,37 @@
  * in ReorgOperator in order to identify sort operations.
  */
 public class RollIndex extends IndexFunction {
-    private static final long serialVersionUID = -8446389232078905200L;
+	private static final long serialVersionUID = -8446389232078905200L;
 
-    private final int _shift;
+	private final int _shift;
 
-    public RollIndex(int shift) {
-        _shift = shift;
-    }
+	public RollIndex(int shift) {
+		_shift = shift;
+	}
 
-    public int getShift() {
-        return _shift;
-    }
+	public int getShift() {
+		return _shift;
+	}
 
-    @Override
-    public boolean computeDimension(int row, int col, CellIndex retDim) {
-        retDim.set(row, col);
-        return false;
-    }
+	@Override
+	public boolean computeDimension(int row, int col, CellIndex retDim) {
+		retDim.set(row, col);
+		return false;
+	}
 
-    @Override
-    public boolean computeDimension(DataCharacteristics in, DataCharacteristics out) {
-        out.set(in.getRows(), in.getCols(), in.getBlocksize(), in.getNonZeros());
-        return false;
-    }
+	@Override
+	public boolean computeDimension(DataCharacteristics in, DataCharacteristics out) {
+		out.set(in.getRows(), in.getCols(), in.getBlocksize(), in.getNonZeros());
+		return false;
+	}
 
-    @Override
-    public void execute(MatrixIndexes in, MatrixIndexes out) {
-        throw new NotImplementedException();
-    }
+	@Override
+	public void execute(MatrixIndexes in, MatrixIndexes out) {
+		throw new NotImplementedException();
+	}
 
-    @Override
-    public void execute(CellIndex in, CellIndex out) {
-        throw new NotImplementedException();
-    }
+	@Override
+	public void execute(CellIndex in, CellIndex out) {
+		throw new NotImplementedException();
+	}
 }

src/main/java/org/apache/sysds/resource/cost/SparkCostUtils.java

@@ -75,7 +75,6 @@ private void updateGen() {
 		}
 	}
 
-	@SuppressWarnings("unused")
 	private void detectSchema(int k) {
 		FrameBlock fb = gen.take();
 		long in = fb.getInMemorySize();
@@ -84,7 +83,6 @@ private void detectSchema(int k) {
 		ret.add(new InOut(in, out));
 	}
 
-	@SuppressWarnings("unused")
 	private void detectAndApply(int k) {
 		FrameBlock fb = gen.take();
 		long in = fb.getInMemorySize();
@@ -94,7 +92,6 @@ private void detectAndApply(int k) {
 		ret.add(new InOut(in, outS));
 	}
 
-	@SuppressWarnings("unused")
 	private void transformEncode(int k) {
 		FrameBlock fb = gen.take();
 		long in = fb.getInMemorySize();