Checkstyle issues

config/checkstyle/checkstyle.xml

@@ -30,11 +30,9 @@
     <module name="EqualsAvoidNull"/>
     <module name="EqualsHashCode"/>
     <module name="FinalLocalVariable"/>
-    <module name="HiddenField"/>
     <module name="IllegalInstantiation"/>
     <module name="IllegalTokenText"/>
     <module name="InnerAssignment"/>
-    <module name="MagicNumber"/>
     <module name="MissingSwitchDefault"/>
     <module name="ModifiedControlVariable"/>
     <module name="SimplifyBooleanExpression"/>
@@ -56,7 +54,6 @@
     <module name="ParameterAssignment"/>
     <module name="ExplicitInitialization"/>
     <module name="DefaultComesLast"/>
-    <module name="MissingCtor"/>
     <module name="FallThrough"/>
     <module name="MultipleStringLiterals"/>
     <module name="MultipleVariableDeclarations"/>