Revert "Merge branch 'golang-workaround'"

This reverts commit 7edceff71ca6aa1281658f6f60ca2e48a6e3f45f, reversing
changes made to 5dea3c9e63.

libexec/pyenv

@@ -44,13 +44,13 @@ fi
 export PYENV_ROOT
 
 if [ -z "${PYENV_DIR}" ]; then
-  PYENV_DIR="$(abs_dirname "$(pwd)/..")"
+  PYENV_DIR="$(pwd)"
 else
   cd "$PYENV_DIR" 2>/dev/null || {
     echo "pyenv: cannot change working directory to \`$PYENV_DIR'"
     exit 1
   } >&2
-  PYENV_DIR="$(abs_dirname "$(pwd)/..")"
+  PYENV_DIR="$(pwd)"
   cd "$OLDPWD"
 fi
 export PYENV_DIR