[java] Deleting unused imports and unused private fields

Author: barancev

java/client/src/org/openqa/selenium/chromium/ChromiumOptions.java

@@ -21,7 +21,6 @@
 import static java.util.Collections.unmodifiableMap;
 import static java.util.stream.Collectors.toList;
 
-import org.openqa.selenium.Capabilities;
 import org.openqa.selenium.SessionNotCreatedException;
 import org.openqa.selenium.internal.Require;
 import org.openqa.selenium.remote.AbstractDriverOptions;

java/client/src/org/openqa/selenium/devtools/Connection.java

@@ -21,7 +21,6 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Multimap;
 import org.openqa.selenium.devtools.idealized.target.model.SessionID;
-import org.openqa.selenium.internal.Debug;
 import org.openqa.selenium.internal.Require;
 import org.openqa.selenium.json.Json;
 import org.openqa.selenium.json.JsonInput;

java/client/src/org/openqa/selenium/remote/locators/CustomLocator.java

@@ -18,17 +18,6 @@
 package org.openqa.selenium.remote.locators;
 
 import org.openqa.selenium.By;
-import org.openqa.selenium.JavascriptExecutor;
-import org.openqa.selenium.NoSuchElementException;
-import org.openqa.selenium.SearchContext;
-import org.openqa.selenium.WebDriver;
-import org.openqa.selenium.WebElement;
-import org.openqa.selenium.WrapsDriver;
-import org.openqa.selenium.json.Json;
-import org.openqa.selenium.json.TypeToken;
-
-import java.lang.reflect.Type;
-import java.util.List;
 
 /**
  * Allows servers to add additional locator strategies to the Selenium
@@ -38,8 +27,6 @@
  */
 public abstract class CustomLocator {
 
-  private static final Json JSON = new Json();
-
   /**
    * @return The locator name, which is the value of the {@code using}
    *   property of the JSON payload.

java/client/src/org/openqa/selenium/support/ui/FluentWait.java

@@ -27,11 +27,9 @@
 import java.time.Clock;
 import java.time.Duration;
 import java.time.Instant;
-import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 import java.util.function.Function;
 import java.util.function.Supplier;
 

java/server/src/org/openqa/selenium/grid/data/DefaultSlotMatcher.java

@@ -19,10 +19,7 @@
 
 import org.openqa.selenium.Capabilities;
 
-import java.util.AbstractMap;
-import java.util.HashSet;
 import java.util.Objects;
-import java.util.Set;
 
 /**
  * Default matching implementation for slots, loosely based on the

java/server/src/org/openqa/selenium/grid/log/LoggingFlags.java

@@ -24,7 +24,6 @@
 import org.openqa.selenium.grid.config.Role;
 
 import java.util.Set;
-import java.util.logging.Level;
 
 import static org.openqa.selenium.grid.config.StandardGridRoles.ALL_ROLES;