Remove empty source file

CMakeLists.txt

@@ -945,7 +945,6 @@ add_library (xrpl_core
     src/ripple/beast/core/WaitableEvent.cpp
     src/ripple/beast/hash/impl/xxhash.cpp
     src/ripple/beast/insight/impl/Collector.cpp
-    src/ripple/beast/insight/impl/Group.cpp
     src/ripple/beast/insight/impl/Groups.cpp
     src/ripple/beast/insight/impl/Hook.cpp
     src/ripple/beast/insight/impl/Metric.cpp

src/ripple/beast/insight/impl/Group.cpp

@@ -1,28 +0,0 @@
-//------------------------------------------------------------------------------
-/*
-    This file is part of Beast: https://github.com/vinniefalco/Beast
-    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
-
-    Permission to use, copy, modify, and/or distribute this software for any
-    purpose  with  or without fee is hereby granted, provided that the above
-    copyright notice and this permission notice appear in all copies.
-
-    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
-    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
-    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-//==============================================================================
-
-namespace beast {
-namespace insight {
-
-namespace detail {
-
-}
-
-}
-}

src/ripple/beast/unity/beast_insight_unity.cpp

@@ -22,7 +22,6 @@
 #include <ripple/beast/insight/Insight.h>
 
 #include <ripple/beast/insight/impl/Collector.cpp>
-#include <ripple/beast/insight/impl/Group.cpp>
 #include <ripple/beast/insight/impl/Groups.cpp>
 #include <ripple/beast/insight/impl/Hook.cpp>
 #include <ripple/beast/insight/impl/Metric.cpp>