Remove useless code

Author: chenzhiguo

checkstyle.xml

@@ -28,18 +28,15 @@
         <module name="com.puppycrawl.tools.checkstyle.checks.blocks.RightCurlyCheck">
             <!--			<property name="option" value="alone"/>-->
         </module>
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.blocks.NeedBracesCheck"/>-->
         <module name="com.puppycrawl.tools.checkstyle.checks.blocks.AvoidNestedBlocksCheck"/>
 
         <!-- Class Design -->
         <module name="com.puppycrawl.tools.checkstyle.checks.design.InnerTypeLastCheck"/>
-        <!--<module name="com.puppycrawl.tools.checkstyle.checks.design.OneTopLevelClassCheck" />-->
 
         <!-- Coding -->
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.CovariantEqualsCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.EmptyStatementCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheck"/>
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.coding.InnerAssignmentCheck"/>-->
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.SimplifyBooleanExpressionCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.SimplifyBooleanReturnCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.StringLiteralEqualityCheck"/>
@@ -54,32 +51,18 @@
         </module>
         <module name="com.puppycrawl.tools.checkstyle.checks.coding.OneStatementPerLineCheck"/>
 
-        <!-- Imports -->
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.imports.AvoidStaticImportCheck"/>-->
-
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.imports.IllegalImportCheck"/>-->
         <module name="com.puppycrawl.tools.checkstyle.checks.imports.RedundantImportCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.imports.UnusedImportsCheck">
             <property name="processJavadoc" value="true"/>
         </module>
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.imports.ImportOrderCheck">-->
-        <!--			<property name="groups" value="java,/^javax?\./,*,org.springframework"/>-->
-        <!--			<property name="ordered" value="false"/>-->
-        <!--			<property name="separated" value="false"/>-->
-        <!--			<property name="option" value="bottom"/>-->
-        <!--			<property name="sortStaticImportsAlphabetically" value="true"/>-->
-        <!--		</module>-->
 
         <!-- Javadoc Comments -->
         <module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocTypeCheck">
             <property name="scope" value="public"/>
             <property name="excludeScope" value="package"/>
             <property name="authorFormat" value=".+\s.+"/>
         </module>
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocVariableCheck">-->
-        <!--			<property name="scope" value="public"/>-->
-        <!--		</module>-->
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocStyleCheck"/>-->
+
         <module name="com.puppycrawl.tools.checkstyle.checks.javadoc.NonEmptyAtclauseDescriptionCheck"/>
         <module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocTagContinuationIndentationCheck">
             <property name="offset" value="0"/>
@@ -106,20 +89,6 @@
         <!-- Modifiers -->
         <module name="com.puppycrawl.tools.checkstyle.checks.modifier.RedundantModifierCheck"/>
 
-        <!-- Regexp -->
-        <!--		<module name="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpSinglelineJavaCheck">-->
-        <!--			<property name="format" value="^\t* +\t*\S"/>-->
-        <!--			<property name="message"-->
-        <!--					  value="Line has leading space characters; indentation should be performed with tabs only."/>-->
-        <!--			<property name="ignoreComments" value="true"/>-->
-        <!--		</module>-->
-        <!--<module name="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpSinglelineJavaCheck">
-            <property name="maximum" value="0"/>
-            <property name="format" value="org\.mockito\.Mockito\.(when|doThrow|doAnswer)" />
-            <property name="message"
-                      value="Please use BDDMockito imports." />
-            <property name="ignoreComments" value="true" />
-        </module>-->
         <module name="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpSinglelineJavaCheck">
             <property name="maximum" value="0"/>
             <property name="format"