Polish

spring-expression/src/main/java/org/springframework/expression/ParserContext.java

@@ -16,8 +16,6 @@
 
 package org.springframework.expression;
 
-import org.springframework.lang.Nullable;
-
 /**
  * Input provided to an expression parser that can influence an expression
  * parsing/compilation routine.

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpNE.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,7 +23,6 @@ import org.springframework.expression.EvaluationException;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.expression.spel.ExpressionState;
 import org.springframework.expression.spel.support.BooleanTypedValue;
-import org.springframework.util.Assert;
 
 /**
  * Implements the not-equal operator.

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpOr.java

@@ -25,7 +25,6 @@ import org.springframework.expression.spel.SpelEvaluationException;
 import org.springframework.expression.spel.SpelMessage;
 import org.springframework.expression.spel.support.BooleanTypedValue;
 import org.springframework.lang.Nullable;
-import org.springframework.util.Assert;
 
 /**
  * Represents the boolean OR operation.

spring-expression/src/main/java/org/springframework/expression/spel/ast/Operator.java

@@ -24,7 +24,6 @@ import org.springframework.asm.MethodVisitor;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.lang.Nullable;
-import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.NumberUtils;
 import org.springframework.util.ObjectUtils;

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectiveConstructorResolver.java

@@ -19,7 +19,6 @@ package org.springframework.expression.spel.support;
 import java.lang.reflect.Constructor;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Comparator;
 import java.util.List;
 
 import org.springframework.core.MethodParameter;

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectivePropertyAccessor.java

@@ -23,7 +23,6 @@ import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.Comparator;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;