Bitwuzla: Remove dead code

Author: daniel-raffler

src/org/sosy_lab/java_smt/solvers/bitwuzla/BitwuzlaFormulaCreator.java

@@ -22,12 +22,9 @@
 import java.util.Comparator;
 import java.util.Deque;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Optional;
 import java.util.Set;
 import org.sosy_lab.java_smt.api.ArrayFormula;
 import org.sosy_lab.java_smt.api.BitvectorFormula;
@@ -580,26 +577,10 @@ public BooleanFormula encapsulateBoolean(Term pTerm) {
     return new BitwuzlaBooleanFormula(pTerm);
   }
 
-  protected Table<String, Sort, Term> getCache() {
+  Table<String, Sort, Term> getCache() {
     return formulaCache;
   }
 
-  // True if the entered String has an existing variable in the cache.
-  protected boolean formulaCacheContains(String variable) {
-    // There is always only 1 type permitted per variable
-    return formulaCache.containsRow(variable);
-  }
-
-  // Optional that contains the variable to the entered String if there is one.
-  protected Optional<Term> getFormulaFromCache(String variable) {
-    Iterator<Entry<Sort, Term>> entrySetIter = formulaCache.row(variable).entrySet().iterator();
-    if (entrySetIter.hasNext()) {
-      // If there is a non-empty row for an entry, there is only one entry
-      return Optional.of(entrySetIter.next().getValue());
-    }
-    return Optional.empty();
-  }
-
   @Override
   public Object convertValue(Term term) {
     Preconditions.checkArgument(term.is_value(), "Term \"%s\" is not a value.", term);