Fix Compiler Warnings

The project contains several compiler warnings.

 * remove unused imports
 * remove unused methods

Author: marschall

src/main/java/org/javamoney/moneta/format/internal/CurrencyToken.java

@@ -20,17 +20,15 @@
 import java.util.Locale;
 import java.util.Objects;
 import java.util.ResourceBundle;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 import javax.money.CurrencyUnit;
 import javax.money.MonetaryAmount;
 import javax.money.MonetaryCurrencies;
-import org.javamoney.moneta.format.CurrencyStyle;
-
 import javax.money.MonetaryException;
 import javax.money.format.MonetaryParseException;
 
+import org.javamoney.moneta.format.CurrencyStyle;
+
 /**
  * Implements a {@link FormatToken} that adds a localizable {@link String}, read
  * by key from a {@link ResourceBundle}.

src/main/java/org/javamoney/moneta/spi/ServicePriority.java

@@ -20,7 +20,6 @@
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
-import java.time.LocalDate;
 
 /**
  * Annotation used for prioritizing multiple services of the same type. The resulting order can be

src/test/java/org/javamoney/moneta/TestCurrency.java

@@ -257,13 +257,6 @@ public String toString(){
             return this.currency.toString();
         }
 
-        // it be used and if so,
-        // consider changing it to a pattern similar as getAvailableCurrencies()
-        // (including the type Set, unless Collection provides value)
-        public static Collection<CurrencyUnit> getAllMatching(String expression){
-            return Collections.emptySet();
-        }
-
     }
 
 }