Remove from_executable, were not really using it, yet.

jedi/__init__.py

@@ -42,5 +42,6 @@ from jedi.api import Script, Interpreter, set_debug_function, \
     preload_module, names
 from jedi import settings
 from jedi.api.environment import find_virtualenvs, find_python_environments, \
-    get_default_environment, InvalidPythonEnvironment
+    get_default_environment, InvalidPythonEnvironment, create_environment, \
+    find_executable, get_python_environment
 from jedi.api.exceptions import InternalError