Move instance module to the context package.

test/test_evaluate/test_compiled.py

@@ -3,7 +3,8 @@ from textwrap import dedent
 import parso
 
 from jedi._compatibility import builtins, is_py3
-from jedi.evaluate import compiled, instance
+from jedi.evaluate import compiled
+from jedi.evaluate.context import instance
 from jedi.evaluate.representation import FunctionContext
 from jedi.evaluate import Evaluator
 from jedi.parser_utils import clean_scope_docstring