Remove unused code

The new implementation is not using realpath.

bin/pyenv-virtualenvs

@@ -7,21 +7,6 @@
 
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
-if [ -L "${BASH_SOURCE[0]}" ]; then
-    READLINK=$(type -p greadlink readlink | head -1)
-    if [ -z "$READLINK" ]; then
-        echo "pyenv: cannot find readlink - are you missing GNU coreutils?" >&2
-        exit 1
-    fi
-    resolve_link() {
-        $READLINK -f "$1"
-    }
-    script_path=$(resolve_link "${BASH_SOURCE[0]}")
-else
-    script_path="${BASH_SOURCE[0]}"
-fi
-
-. "${script_path%/*}"/../libexec/pyenv-virtualenv-realpath
 
 if [ -z "$PYENV_ROOT" ]; then
   PYENV_ROOT="${HOME}/.pyenv"
@@ -49,39 +34,6 @@ done
 
 versions_dir="${PYENV_ROOT}/versions"
 
-if ! enable -f "${BASH_SOURCE%/*}"/pyenv-realpath.dylib realpath 2>/dev/null; then
-  if [ -n "$PYENV_NATIVE_EXT" ]; then
-    echo "pyenv: failed to load \`realpath' builtin" >&2
-    exit 1
-  fi
-
-  READLINK=$(type -P readlink)
-  if [ -z "$READLINK" ]; then
-    echo "pyenv: cannot find readlink - are you missing GNU coreutils?" >&2
-    exit 1
-  fi
-
-  resolve_link() {
-    $READLINK "$1"
-  }
-
-  realpath() {
-    local path="$1"
-    local name
-
-    # Use a subshell to avoid changing the current path
-    (
-    while [ -n "$path" ]; do
-      name="${path##*/}"
-      [ "$name" = "$path" ] || cd "${path%/*}"
-      path="$(resolve_link "$name" || true)"
-    done
-
-    echo "${PWD}/$name"
-    )
-  }
-fi
-
 if [[ ${BASH_VERSINFO[0]} -gt 3 ]]; then
   declare -A current_versions
 else