binutils-wrapper: Remove stray file left over from old revert

binutils-wrapper was removed in ec8d41f08c. I
hope to reintroduce it, but under a different name, so this can go.

pkgs/build-support/binutils-wrapper/macos-sierra-reexport-hack.bash

@@ -1,108 +0,0 @@
-#! @shell@
-
-set -eu -o pipefail
-
-path_backup="$PATH"
-if [ -n "@coreutils_bin@" ]; then
-  PATH="@coreutils_bin@/bin"
-fi
-
-declare -r recurThreshold=300
-
-declare overflowCount=0
-for ((n=0; n < $#; ++n)); do
-    case "${!n}" in
-        -l*) let overflowCount+=1 ;;
-        -reexport-l*) let overflowCount+=1 ;;
-        *) ;;
-    esac
-done
-
-declare -a allArgs=()
-
-if (( "$overflowCount" <= "$recurThreshold" )); then
-    allArgs=("$@")
-else
-    declare -a childrenLookup=() childrenLink=()
-
-    while (( $# )); do
-        case "$1" in
-            -L/*)
-                childrenLookup+=("$1")
-                allArgs+=("$1")
-                ;;
-            -L)
-                echo "cctools LD does not support '-L foo' or '-l foo'" >&2
-                exit 1
-                ;;
-            -l)
-                echo "cctools LD does not support '-L foo' or '-l foo'" >&2
-                exit 1
-                ;;
-            -lazy_library | -lazy_framework | -lto_library)
-                # We aren't linking any "azy_library", "to_library", etc.
-                allArgs+=("$1")
-                ;;
-            -lazy-l | -weak-l)    allArgs+=("$1") ;;
-                # We can't so easily prevent header issues from these.
-            -lSystem)             allArgs+=("$1") ;;
-                # Special case as indirection seems like a bad idea for something
-                # so fundamental. Can be removed for simplicity.
-            -l?* | -reexport-l?*) childrenLink+=("$1") ;;
-            *)                    allArgs+=("$1") ;;
-        esac
-
-        shift
-    done
-
-    declare n=0
-    while (( $n < "${#childrenLink[@]}" )); do
-        if [[ "${childrenLink[n]}" = -l* ]]; then
-            childrenLink[n]="-reexport${childrenLink[n]}"
-        fi
-        let ++n
-    done
-    unset n
-
-    declare -r outputNameLibless=$(basename $( \
-        if [[ -z "${outputName:+isUndefined}" ]]; then
-            echo unnamed
-        elif [[ "${outputName:0:3}" = lib ]]; then
-            echo "${outputName:3}"
-        else
-            echo "${outputName}"
-        fi))
-    declare -ra children=("$outputNameLibless-reexport-delegate-0" \
-                          "$outputNameLibless-reexport-delegate-1")
-
-    mkdir -p "$out/lib"
-
-    PATH="$PATH:@out@/bin"
-
-    symbolBloatObject=$outputNameLibless-symbol-hack.o
-    if [[ ! -e $symbolBloatObject ]]; then
-        # `-Q` means use GNU Assembler rather than Clang, avoiding an awkward
-        # dependency cycle.
-        printf '.private_extern _______child_hack_foo\nchild_hack_foo:\n' \
-            | @binPrefix@as -Q -- -o $symbolBloatObject
-    fi
-
-    # first half of libs
-    @binPrefix@ld -macosx_version_min $MACOSX_DEPLOYMENT_TARGET -arch x86_64 -dylib \
-      -o "$out/lib/lib${children[0]}.dylib" \
-      -install_name "$out/lib/lib${children[0]}.dylib" \
-      "${childrenLookup[@]}" "$symbolBloatObject" \
-      "${childrenLink[@]:0:$((${#childrenLink[@]} / 2 ))}"
-
-    # second half of libs
-    @binPrefix@ld -macosx_version_min $MACOSX_DEPLOYMENT_TARGET -arch x86_64 -dylib \
-      -o "$out/lib/lib${children[1]}.dylib" \
-      -install_name "$out/lib/lib${children[1]}.dylib" \
-      "${childrenLookup[@]}" "$symbolBloatObject" \
-      "${childrenLink[@]:$((${#childrenLink[@]} / 2 ))}"
-
-    allArgs+=("-L$out/lib" "-l${children[0]}" "-l${children[1]}")
-fi
-
-PATH="$path_backup"
-exec @prog@ "${allArgs[@]}"