Solve several Codacy issues

Author: Flashky

src/main/java/com/adventofcode/flashk/day17/ClumsyCrucibleRefactor.java

@@ -1,10 +1,7 @@
 package com.adventofcode.flashk.day17;
 
 import com.adventofcode.flashk.common.Vector2;
-import org.apache.commons.lang3.tuple.ImmutablePair;
-import org.apache.commons.lang3.tuple.ImmutableTriple;
 import org.apache.commons.lang3.tuple.Pair;
-import org.apache.commons.lang3.tuple.Triple;
 
 import java.util.List;
 import java.util.Optional;

src/main/java/com/adventofcode/flashk/day17/Tile.java

@@ -10,8 +10,6 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.stream.Stream;
-
 
 @Getter
 @Setter

src/main/java/com/adventofcode/flashk/day19/Aplenty.java

@@ -32,7 +32,6 @@ public Aplenty(List<String> inputs) {
                 workflowPerPart.put(part, StringUtils.EMPTY);
             }
         }
-        int a = 3;
     }
 
     public long solveA() {

src/main/java/com/adventofcode/flashk/day19/Rule.java

@@ -10,7 +10,6 @@ public class Rule {
     private static final Pattern FULL_RULE_PATTERN = Pattern.compile("([xmas])([><])(\\d*):(\\w*)");
 
     private static final char LESS_THAN = '<';
-    private static final char GREATER_THAN = '>';
 
     private char letter;
     private char condition;

src/main/java/com/adventofcode/flashk/day19/Workflow.java

@@ -5,7 +5,6 @@
 
 import java.util.Arrays;
 import java.util.List;
-import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
@@ -28,21 +27,6 @@ public Workflow(String input) {
         String[] rulesArray = rulesString.split(",");
         rules = Arrays.stream(rulesArray).map(Rule::new).collect(Collectors.toList());
 
-        // TODO minor improvement
-        // some workflows lead always to the same output workflow, in that case
-        // rules can be directely bypassed.
-        boolean sameWorkflows = true;
-        String workflowName = rules.get(0).getDestinationWorkflow();
-        for(Rule rule : rules) {
-            if(!rule.getDestinationWorkflow().equals(workflowName)) {
-                sameWorkflows = false;
-            }
-        }
-
-        if(sameWorkflows) {
-            rules.clear();
-            rules.add(new Rule(workflowName));
-        }
     }
 
     public String run(Part part) {