bintools-wrapper: Remove LDEMULATION setting.

As far as I can tell, this has never actually done anything, as
LDEMULATION is not exported. I tried exporting it and builds broke,
and as it doesn't seem to have caused any problems as a noop all these
years it didn't seem worth investigating further.

pkgs/build-support/bintools-wrapper/default.nix

@@ -184,39 +184,6 @@ stdenv.mkDerivation {
       done
     '';
 
-  emulation = let
-    fmt =
-      /**/ if targetPlatform.isDarwin  then "mach-o"
-      else if targetPlatform.isWindows then "pe"
-      else "elf" + toString targetPlatform.parsed.cpu.bits;
-    endianPrefix = if targetPlatform.isBigEndian then "big" else "little";
-    sep = optionalString (!targetPlatform.isMips && !targetPlatform.isPower && !targetPlatform.isRiscV) "-";
-    arch =
-      /**/ if targetPlatform.isAarch64 then endianPrefix + "aarch64"
-      else if targetPlatform.isAarch32     then endianPrefix + "arm"
-      else if targetPlatform.isx86_64  then "x86-64"
-      else if targetPlatform.isx86_32  then "i386"
-      else if targetPlatform.isMips    then {
-          mips     = "btsmipn32"; # n32 variant
-          mipsel   = "ltsmipn32"; # n32 variant
-          mips64   = "btsmip";
-          mips64el = "ltsmip";
-        }.${targetPlatform.parsed.cpu.name}
-      else if targetPlatform.isMmix then "mmix"
-      else if targetPlatform.isPower then if targetPlatform.isBigEndian then "ppc" else "lppc"
-      else if targetPlatform.isSparc then "sparc"
-      else if targetPlatform.isMsp430 then "msp430"
-      else if targetPlatform.isAvr then "avr"
-      else if targetPlatform.isAlpha then "alpha"
-      else if targetPlatform.isVc4 then "vc4"
-      else if targetPlatform.isOr1k then "or1k"
-      else if targetPlatform.isM68k then "m68k"
-      else if targetPlatform.isS390 then "s390"
-      else if targetPlatform.isRiscV then "lriscv"
-      else throw "unknown emulation for platform: ${targetPlatform.config}";
-    in if targetPlatform.useLLVM or false then ""
-       else targetPlatform.bfdEmulation or (fmt + sep + arch);
-
   strictDeps = true;
   depsTargetTargetPropagated = extraPackages;
 

pkgs/build-support/bintools-wrapper/ld-wrapper.sh

@@ -93,11 +93,6 @@ if [ -e @out@/nix-support/add-local-ldflags-before.sh ]; then
 fi
 
 
-# Specify the target emulation if nothing is passed in ("-m" overrides this
-# environment variable). Ensures we never blindly fallback on targeting the host
-# platform.
-: ${LDEMULATION:=@emulation@}
-
 # Three tasks:
 #
 #   1. Find all -L... switches for rpath