Remove starter implementations (#681)

Removed starter implementations for exercises 21 and beyond, according to POLICIES.md.

exercises/all-your-base/src/main/java/BaseConverter.java

@@ -1,5 +0,0 @@
-class BaseConverter {
-
-
-
-}

exercises/anagram/src/main/java/Anagram.java

@@ -1,2 +0,0 @@
-public class Anagram {
-}

exercises/beer-song/src/main/java/BeerSong.java

@@ -1,3 +0,0 @@
-public class BeerSong {
-
-}

exercises/binary-search/src/main/java/BinarySearch.java

@@ -1,4 +0,0 @@
-
-public class BinarySearch {
-
-}

exercises/bracket-push/src/main/java/BracketChecker.java

@@ -1,5 +0,0 @@
-class BracketChecker {
-
-
-
-}

exercises/change/src/main/java/ChangeCalculator.java

@@ -1,5 +0,0 @@
-class ChangeCalculator {
-
-
-
-}

exercises/collatz-conjecture/src/main/java/CollatzCalculator.java

@@ -1,7 +0,0 @@
-class CollatzCalculator {
-
-    int computeStepCount(int start) {
-        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
-    }
-
-}

exercises/diamond/src/main/java/DiamondPrinter.java

@@ -1,5 +0,0 @@
-class DiamondPrinter {
-
-
-
-}

exercises/etl/src/main/java/Etl.java

@@ -3,6 +3,6 @@ import java.util.Map;
 
 public class Etl {
     public Map<String, Integer> transform(Map<Integer, List<String>> old) {
-        return null;
+        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }
 }

exercises/flatten-array/src/main/java/Flattener.java

@@ -1,5 +0,0 @@
-class Flattener {
-
-
-
-}

exercises/kindergarten-garden/src/main/java/KindergartenGarden.java

@@ -1,15 +0,0 @@
-import java.util.List;
-
-public class KindergartenGarden {
-    public KindergartenGarden(String garden, String[] students) {
-        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
-    }
-
-    public KindergartenGarden(String garden) {
-        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
-    }
-
-    public List<Plant> getPlantsOfStudent(String student) {
-        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
-    }
-}

exercises/minesweeper/src/main/java/MinesweeperBoard.java

@@ -1,5 +0,0 @@
-public class MinesweeperBoard {
-
-
-
-}

exercises/nucleotide-count/src/main/java/DNA.java

@@ -1,2 +0,0 @@
-public class DNA {
-}

exercises/ocr-numbers/src/main/java/OpticalCharacterReader.java

@@ -1,5 +0,0 @@
-class OpticalCharacterReader {
-
-
-
-}

exercises/pythagorean-triplet/src/main/java/PythagoreanTriplet.java

@@ -1,3 +0,0 @@
-
-public class PythagoreanTriplet {
-}

exercises/queen-attack/src/main/java/BoardCoordinate.java

@@ -1,5 +0,0 @@
-public class BoardCoordinate {
-
-
-
-}

exercises/queen-attack/src/main/java/QueenAttackCalculator.java

@@ -1,5 +0,0 @@
-public class QueenAttackCalculator {
-
-
-
-}

exercises/rectangles/src/main/java/RectangleCounter.java

@@ -1,5 +0,0 @@
-class RectangleCounter {
-
-
-
-}

exercises/robot-simulator/src/main/java/Robot.java

@@ -1,5 +0,0 @@
-class Robot {
-
-
-
-}

exercises/run-length-encoding/src/main/java/RunLengthEncoding.java

@@ -1,9 +0,0 @@
-public class RunLengthEncoding {
-    public String encode(String data) {
-        throw new UnsupportedOperationException("Method has not been implemented yet.");
-    }
-
-    public String decode(String encodedData) {
-        throw new UnsupportedOperationException("Method has not been implemented yet.");
-    }
-}

exercises/saddle-points/src/main/java/Matrix.java

@@ -1,5 +0,0 @@
-class Matrix {
-
-
-
-}

exercises/series/src/main/java/Series.java

@@ -1,3 +0,0 @@
-public class Series {
-    
-}

exercises/sublist/src/main/java/RelationshipComputer.java

@@ -1,5 +0,0 @@
-class RelationshipComputer<T> {
-
-
-
-}

exercises/word-count/src/main/java/WordCount.java

@@ -1,2 +0,0 @@
-public class WordCount {
-}

exercises/wordy/src/main/java/WordProblemSolver.java

@@ -1,5 +0,0 @@
-class WordProblemSolver {
-
-
-
-}