Revert "Make wrapper script more robust (#445)"

This reverts commit 843e1a6.

Author: axelson

apps/elixir_ls_utils/priv/language_server.sh

@@ -1,17 +1,7 @@
 #!/bin/sh
 # Launches the language server. This script must be in the same directory as the compiled .ez archives.
 
-readlink_f () {
-  cd "$(dirname "$1")" > /dev/null
-  filename="$(basename "$1")"
-  if [ -h "$filename" ]; then
-    readlink_f "$(readlink "$filename")"
-  else
-    echo "$(pwd -P)/$filename"
-  fi
-}
-
-dir=$(dirname $(readlink_f "$0"))
+dir=$(dirname "$0")
 
 export ELS_MODE=language_server
 export ELS_SCRIPT="ElixirLS.LanguageServer.CLI.main()"