No need to suppress warnings for this particular class

See #669

Author: cdunn2001

include/json/writer.h

@@ -275,8 +275,6 @@ class JSONCPP_DEPRECATED("Use StreamWriterBuilder instead") JSON_API StyledWrite
  * \sa Reader, Value, Value::setComment()
  * \deprecated Use StreamWriterBuilder.
  */
-#pragma warning(push)
-#pragma warning(disable:4996) // Deriving from deprecated class
 class JSONCPP_DEPRECATED("Use StreamWriterBuilder instead") JSON_API StyledStreamWriter {
 public:
 /**
@@ -318,7 +316,6 @@ class JSONCPP_DEPRECATED("Use StreamWriterBuilder instead") JSON_API StyledStrea
   bool addChildValues_ : 1;
   bool indented_ : 1;
 };
-#pragma warning(pop)
 
 #if defined(JSON_HAS_INT64)
 JSONCPP_STRING JSON_API valueToString(Int value);