THRIFT-2512 lib/${language}/README.md

Client: cpp

remove README_WINDOWS.md from WINDOWS_DIST
diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index 39b85b3..7fcf9bd 100755
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -225,7 +225,6 @@
 THRIFT = $(top_builddir)/compiler/cpp/thrift
 
 WINDOWS_DIST = \
-             README_WINDOWS.md \
              src/thrift/windows \
              thrift.sln \
              libthrift.vcxproj \