Use upstream is_clang.py

The new version works fine under Python 3

PKGBUILD

@@ -40,8 +40,6 @@ source=("https://github.com/aseprite/aseprite/releases/download/v$pkgver/Aseprit
         # Only pulling what we need, though
         "git+https://chromium.googlesource.com/chromium/buildtools.git#commit=505de88083136eefd056e5ee4ca0f01fe9b33de8"
         "git+https://skia.googlesource.com/common.git#commit=9737551d7a52c3db3262db5856e6bcd62c462b92"
-        # Python 3-compliant version of the script
-        is_clang.py
         # Based on https://patch-diff.githubusercontent.com/raw/aseprite/aseprite/pull/2535.patch
         shared-libarchive.patch
         # Based on https://patch-diff.githubusercontent.com/raw/aseprite/aseprite/pull/2523.patch
@@ -53,7 +51,6 @@ sha256sums=('966bd940e1072ed24b70e211ca2bb1eb9aa6432ca12972a8e1df5f1e0150213d'
             'SKIP'
             'SKIP'
             'SKIP'
-            'cb901aaf479bcf1a2406ce21eb31e43d3581712a9ea245672ffd8fbcd9190441'
             'e42675504bfbc17655aef1dca957041095026cd3dd4e6981fb6df0a363948aa7'
             '2d6b5f33f23adc4f9912511ac35311a776ce34519ef40e9db3659e4c5457f055'
             'eb9f544e68b41b5cb1a9ab7a6648db51587e67e94f1a452cb5a84f3d224bf5d0'
@@ -74,9 +71,6 @@ prepare() {
 		ln -svfT "$(realpath $_dep)" "skia/${_skiadeps[$_dep]}"
 	done
 
-	# Replace `is_clang.py` with Python 3-compliant version
-	cp -v is_clang.py skia/gn
-
 	# Allow using shared libarchive (the bundled version prevents using the `None` build type...)
 	env -C aseprite patch -tp1 <shared-libarchive.patch
 	# Allow using shared libwebp (breaks builds otherwise...)