[bot]: remove unreferenced code

pkgs/development/tools/misc/dialog/default.nix

@@ -3,8 +3,7 @@
 , unicodeSupport ? true
 }:
 
-let optional = stdenv.lib.optional;
-    optStr = stdenv.lib.optionalString;
+let optStr = stdenv.lib.optionalString;
     buildShared = !stdenv.isDarwin;
 in
 

pkgs/development/tools/phantomjs2/default.nix

@@ -5,24 +5,6 @@
 }:
 
 let
-  fakeXcrun = writeScriptBin "xcrun" ''
-    #!${stdenv.shell}
-    echo >&2 "Fake xcrun: ''$@"
-    args=()
-    while (("$#")); do
-      case "$1" in
-        -sdk*) shift;;
-        -find*) shift;;
-        *) args+=("$1");;
-      esac
-      shift
-    done
-
-    if [ "''${#args[@]}" -gt "0" ]; then
-      echo >&2 "Fake xcrun: ''${args[@]}"
-      exec "''${args[@]}"
-    fi
-  '';
   fakeClang = writeScriptBin "clang" ''
     #!${stdenv.shell}
     if [[ "$@" == *.c ]]; then

pkgs/development/tools/selenium/server/default.nix

@@ -6,9 +6,6 @@ with stdenv.lib;
 let
   minorVersion = "3.6";
   patchVersion = "0";
-  arch = if stdenv.system == "x86_64-linux" then "amd64"
-         else if stdenv.system == "i686-linux" then "i386"
-         else "";
 
 in stdenv.mkDerivation rec {
   name = "selenium-server-standalone-${version}";