Removed unused code

[radarhere]

save_all is not used in the following code.

Pillow/src/PIL/BlpImagePlugin.py

Lines 445 to 463 in aaa7587

	def _save(im, fp, filename, save_all=False):
	if im.mode != "P":
	msg = "Unsupported BLP image mode"
	raise ValueError(msg)
	magic = b"BLP1" if im.encoderinfo.get("blp_version") == "BLP1" else b"BLP2"
	fp.write(magic)
	fp.write(struct.pack("<i", 1)) # Uncompressed or DirectX compression
	fp.write(struct.pack("<b", Encoding.UNCOMPRESSED))
	fp.write(struct.pack("<b", 1 if im.palette.mode == "RGBA" else 0))
	fp.write(struct.pack("<b", 0)) # alpha encoding
	fp.write(struct.pack("<b", 0)) # mips
	fp.write(struct.pack("<II", *im.size))
	if magic == b"BLP1":
	fp.write(struct.pack("<i", 5))
	fp.write(struct.pack("<i", 0))
	ImageFile._save(im, fp, [("BLP", (0, 0) + im.size, 0, im.mode)])

It isn't necessary. See JpegImagePlugin for example.

Pillow/src/PIL/JpegImagePlugin.py

Line 633 in aaa7587

def _save(im, fp, filename):