Remove unused logger from class

The logger is not used in this class.  Might as well remove it.

json-path/src/main/java/com/jayway/jsonpath/internal/JsonFormatter.java

@@ -14,13 +14,8 @@
  */
 package com.jayway.jsonpath.internal;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 public class JsonFormatter {
 
-    private static final Logger logger = LoggerFactory.getLogger(JsonFormatter.class);
-
     private static final String INDENT = "   ";
 
     private static final String NEW_LINE = System.getProperty("line.separator");

json-path/src/main/java/com/jayway/jsonpath/internal/token/RootPathToken.java

@@ -15,16 +15,12 @@
 package com.jayway.jsonpath.internal.token;
 
 import com.jayway.jsonpath.internal.PathRef;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  *
  */
 public class RootPathToken extends PathToken {
 
-    private static final Logger logger = LoggerFactory.getLogger(RootPathToken.class);
-
     private PathToken tail;
     private int tokenCount;
 

json-path/src/main/java/com/jayway/jsonpath/spi/json/GsonJsonProvider.java

@@ -24,8 +24,6 @@ import com.google.gson.JsonPrimitive;
 import com.google.gson.internal.LazilyParsedNumber;
 import com.jayway.jsonpath.InvalidJsonException;
 import com.jayway.jsonpath.JsonPathException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -38,8 +36,6 @@ import java.util.Map;
 
 public class GsonJsonProvider extends AbstractJsonProvider {
 
-    private static final Logger logger = LoggerFactory.getLogger(GsonJsonProvider.class);
-
     private static final JsonParser parser = new JsonParser();
     private static final Gson gson = new GsonBuilder().create();
 

json-path/src/main/java/com/jayway/jsonpath/spi/mapper/JsonSmartMappingProvider.java

@@ -19,8 +19,6 @@ import com.jayway.jsonpath.TypeRef;
 import net.minidev.json.JSONValue;
 import net.minidev.json.writer.JsonReader;
 import net.minidev.json.writer.JsonReaderI;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.math.BigDecimal;
 import java.text.DateFormat;
@@ -30,8 +28,6 @@ import java.util.concurrent.Callable;
 
 public class JsonSmartMappingProvider implements MappingProvider {
 
-    private static final Logger logger = LoggerFactory.getLogger(JsonSmartMappingProvider.class);
-
     private static JsonReader DEFAULT = new JsonReader();
 
     static {