make autoflake more aggressive & fix some lint

scripts/lint

@@ -1,11 +1,18 @@
 #!/bin/sh -e
 
+autoflake_opts='
+    --remove-duplicate-keys
+    --remove-unused-variables
+    --remove-all-unused-imports
+    --ignore-init-module-imports
+    '
+
 if [ "$1" = '--fix' ]; then
     (
         set -x
+        autoflake --in-place --recursive $autoflake_opts .
         black .
         isort --profile black .
-        autoflake --in-place --recursive .
         mypy . || :  # ignore
     )
     exit
@@ -13,9 +20,9 @@ fi
 
 error=0
 
+(set -x; autoflake --check --recursive $autoflake_opts . | uniq) || error=$?
 (set -x; black --check .) || error=$?
 (set -x; isort --profile black --check .) || error=$?
-(set -x; autoflake --check --recursive . | uniq) || error=$?
 (set -x; mypy .) || :  # ignore
 
 exit "$error"