Remove some unhelpful docs

Docs/Lua-String-Formatting.md

@@ -1,12 +0,0 @@
-# Lua String Formatting
-
-Lua contains a builtin routine, string.format, which is similar to "printf."
-We have reimplemented this from scratch, adding a bunch of new formatting
-directives.
-
-We have also added formatting routines that output to the
-console and the debug logs.  The new routines are:
-
-format(format_string, arg1, arg2, arg3...)
-dformat(format_string, arg1, arg2, arg3...)
-