bpo-33648: Remove PY_WARN_ON_C_LOCALE (GH-7114)

This code does not appear to be used anywhere in the python code base.
The use was removed in eb81795d7d3a8c898fa89.
diff --git a/Misc/ACKS b/Misc/ACKS
index 8e1b6f7..2cf5e10 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -18,6 +18,7 @@
 Marc Abramowitz
 Eldar Abusalimov
 Ron Adam
+Eitan Adler
 Anton Afanasyev
 Ali Afshar
 Nitika Agarwal
diff --git a/Misc/NEWS.d/next/Build/2018-05-25-13-05-51.bpo-33648.bJ4JZH.rst b/Misc/NEWS.d/next/Build/2018-05-25-13-05-51.bpo-33648.bJ4JZH.rst
new file mode 100644
index 0000000..eaac4eb
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2018-05-25-13-05-51.bpo-33648.bJ4JZH.rst
@@ -0,0 +1,2 @@
+The --with-c-locale-warning configuration flag has been removed. It has had
+no effect for about a year.