Fix pylint.

mesonbuild/interpreter/interpreter.py

diff --git a/mesonbuild/interpreter/interpreter.py b/mesonbuild/interpreter/interpreter.py
index 5e36eea..0526f9f 100644
--- a/mesonbuild/interpreter/interpreter.py
+++ b/mesonbuild/interpreter/interpreter.py
@@ -103,7 +103,6 @@
 import textwrap
 import importlib
 import copy
-import contextlib
 
 if T.TYPE_CHECKING:
     import argparse