Deprecate DCE:on (#13839)

lib/pure/fenv.nim

@@ -10,8 +10,6 @@
 ## Floating-point environment. Handling of floating-point rounding and
 ## exceptions (overflow, division by zero, etc.).
 
-{.deadCodeElim: on.} # dce option deprecated
-
 when defined(Posix) and not defined(genode):
   {.passl: "-lm".}
 

lib/pure/net.nim

@@ -66,7 +66,6 @@
 
 include "system/inclrtl"
 
-{.deadCodeElim: on.} # dce option deprecated
 import nativesockets, os, strutils, times, sets, options, std/monotimes
 from ssl_certs import scanSSLCertificates
 export nativesockets.Port, nativesockets.`$`, nativesockets.`==`

lib/pure/parseutils.nim

@@ -45,9 +45,6 @@
 ## * `parsexml module<parsexml.html>`_ for a XML / HTML parser
 ## * `other parsers<lib.html#pure-libraries-parsers>`_ for other parsers
 
-
-{.deadCodeElim: on.} # dce option deprecated
-
 {.push debugger: off.} # the user does not want to trace a part
                        # of the standard library!
 

lib/pure/ropes.nim

@@ -19,8 +19,6 @@
 include "system/inclrtl"
 import streams
 
-{.deadCodeElim: on.} # dce option deprecated
-
 {.push debugger: off.} # the user does not want to trace a part
                        # of the standard library!
 

lib/pure/strmisc.nim

@@ -12,8 +12,6 @@
 
 import strutils
 
-{.deadCodeElim: on.} # dce option deprecated
-
 proc expandTabs*(s: string, tabSize: int = 8): string {.noSideEffect,
   procvar.} =
   ## Expand tab characters in `s` replacing them by spaces.

lib/pure/unicode.nim

@@ -20,9 +20,6 @@
 ## * `unidecode module <unidecode.html>`_
 ## * `encodings module <encodings.html>`_
 
-
-{.deadCodeElim: on.} # dce option deprecated
-
 include "system/inclrtl"
 
 type