Remove a reference to the docs of fpformat.
diff --git a/Doc/library/strings.rst b/Doc/library/strings.rst
index dfb272f..4c7f9eb 100644
--- a/Doc/library/strings.rst
+++ b/Doc/library/strings.rst
@@ -26,5 +26,4 @@
    codecs.rst
    unicodedata.rst
    stringprep.rst
-   fpformat.rst