Fix linter issues.

endpoints-framework/src/main/java/com/google/api/server/spi/auth/GoogleJwtAuthenticator.java

@@ -27,7 +27,6 @@
 
 import java.io.IOException;
 import java.security.GeneralSecurityException;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javax.servlet.http.HttpServletRequest;

endpoints-framework/src/main/java/com/google/api/server/spi/auth/GoogleOAuth2Authenticator.java

@@ -26,7 +26,6 @@
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableSet;
 
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javax.servlet.http.HttpServletRequest;

endpoints-framework/src/main/java/com/google/api/server/spi/config/model/ApiIssuerAudienceConfig.java

@@ -15,7 +15,6 @@
  */
 package com.google.api.server.spi.config.model;
 
-import com.google.common.collect.ImmutableListMultimap;
 import com.google.common.collect.ImmutableMap;
 
 import com.google.common.collect.ImmutableSet;

endpoints-framework/src/main/java/com/google/api/server/spi/config/model/ApiMethodConfig.java

@@ -260,7 +260,7 @@ public boolean equals(Object o) {
           Objects.equals(peerAuthenticators, config.peerAuthenticators) &&
           Objects.equals(typeLoader, config.typeLoader) &&
           ignored == config.ignored &&
-          apiKeyRequired == config.apiKeyRequired &&
+          Objects.equals(apiKeyRequired, config.apiKeyRequired) &&
           Objects.equals(returnType, config.returnType) &&
           Objects.equals(metricCosts, config.metricCosts);
     } else {

endpoints-framework/src/main/java/com/google/api/server/spi/config/model/ApiSerializationConfig.java

@@ -107,5 +107,12 @@ public boolean equals(Object obj) {
       }
       return false;
     }
+
+    @Override
+    public int hashCode() {
+      int result = sourceType.hashCode();
+      result = 31 * result + serializer.hashCode();
+      return result;
+    }
   }
 }

endpoints-framework/src/main/java/com/google/api/server/spi/config/model/Schema.java

@@ -24,12 +24,12 @@ public abstract class Schema {
   /**
    * If the schema is an enum, a list of possible enum values in their string representation.
    */
-  @Nullable public abstract ImmutableList<String> enumValues();
+  public abstract ImmutableList<String> enumValues();
 
   /**
    * If the schema is an enum, a list of enum value descriptions.
    */
-  @Nullable public abstract ImmutableList<String> enumDescriptions();
+  public abstract ImmutableList<String> enumDescriptions();
 
   public static Builder builder() {
     return new AutoValue_Schema.Builder();

endpoints-framework/src/main/java/com/google/api/server/spi/discovery/DiscoveryGenerator.java

@@ -66,7 +66,6 @@
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
-import java.util.SortedSet;
 import java.util.TreeMap;
 
 /**

endpoints-framework/src/main/java/com/google/api/server/spi/request/RestServletRequestParamReader.java

@@ -33,7 +33,6 @@
 
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
-import java.util.Collection;
 import java.util.Enumeration;
 import java.util.List;
 import java.util.Map;

endpoints-framework/src/main/java/com/google/api/server/spi/request/ServletRequestParamReader.java

@@ -118,7 +118,7 @@ protected static List<String> getParameterNames(EndpointMethod endpointMethod)
         if (annotation == null) {
           parameterNames.add(null);
         } else {
-          parameterNames.add((String) annotation.getClass().getMethod("value").invoke(annotation));
+          parameterNames.add((String) annotation.annotationType().getMethod("value").invoke(annotation));
         }
       }
       endpointMethod.setParameterNames(parameterNames);

endpoints-framework/src/main/java/com/google/api/server/spi/response/RestResponseResultWriter.java

@@ -16,14 +16,11 @@
 package com.google.api.server.spi.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.api.server.spi.ObjectMapperUtil;
 import com.google.api.server.spi.ServiceException;
 import com.google.api.server.spi.config.model.ApiSerializationConfig;
 import com.google.common.base.Strings;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap;
 
 import java.io.IOException;