PyLint fix

.pylintrc

@@ -16,6 +16,7 @@ disable=
     useless-import-alias,
     bad-option-value,
     consider-using-dict-items,
+    consider-using-f-string,
 
     ; PY2 Compat
     super-with-arguments,

platformio/commands/home/rpc/handlers/project.py

@@ -265,7 +265,8 @@ class ProjectRPC:
                 fp.write(main_content.strip())
         return project_dir
 
-    async def import_arduino(self, board, use_arduino_libs, arduino_project_dir):
+    @staticmethod
+    async def import_arduino(board, use_arduino_libs, arduino_project_dir):
         board = str(board)
         # don't import PIO Project
         if is_platformio_project(arduino_project_dir):