Cleanups:

* Reduce Beast dependencies
* Remove unnecessary includes
* Don't use deprecated bassert macros
* Don't use beast::String in Json::Value

src/ripple/json/impl/Object.cpp

@@ -20,6 +20,7 @@
 #include <BeastConfig.h>
 #include <ripple/basics/contract.h>
 #include <ripple/json/Object.h>
+#include <cassert>
 
 namespace Json {
 

src/ripple/json/impl/json_reader.cpp

@@ -20,6 +20,7 @@
 #include <BeastConfig.h>
 #include <ripple/basics/contract.h>
 #include <ripple/json/json_reader.h>
+#include <algorithm>
 #include <string>
 #include <cctype>
 

src/ripple/json/impl/json_value.cpp

@@ -276,15 +276,6 @@ Value::Value ( std::string const& value )
 
 }
 
-Value::Value (beast::String const& beastString)
-    : type_ ( stringValue )
-    , allocated_ ( true )
-{
-    value_.string_ = valueAllocator ()->duplicateStringValue ( beastString.toStdString ().c_str (),
-                     (unsigned int)beastString.length () );
-
-}
-
 Value::Value ( const StaticString& value )
     : type_ ( stringValue )
     , allocated_ ( false )

src/ripple/json/impl/json_writer.cpp

@@ -19,6 +19,7 @@
 
 #include <BeastConfig.h>
 #include <ripple/json/json_writer.h>
+#include <cassert>
 #include <iomanip>
 #include <sstream>
 #include <string>