Remove extra CPPLINT.cfg files.

The generator/template folder has a CPPLINT.cfg which covers the
templates already so the generator one isn't required.

Change-Id: Ie1212475cd3a18daaf8a2425f3589c1f1b98b962
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86441
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/generator/CPPLINT.cfg b/generator/CPPLINT.cfg
deleted file mode 100644
index 51ff339..0000000
--- a/generator/CPPLINT.cfg
+++ /dev/null
@@ -1 +0,0 @@
-exclude_files=.*