Make noise.png smaller

Created by: tomasgreif

I'm actually not sure why there is noise.png, but it's size is 269kB. That is quite a lot for transparent square. I've made same square in Gimp and it has only 585B. Can you replace current picture with my version or create another smaller version?

-- Current image --
ExifTool Version Number         : 9.04
File Name                       : noise.png
Directory                       : .
File Size                       : 269 kB
File Modification Date/Time     : 2014:03:06 19:18:40+01:00
File Access Date/Time           : 2014:03:07 08:53:05+01:00
File Permissions                : rw-r--r--
File Type                       : PNG
MIME Type                       : image/png
Image Width                     : 500
Image Height                    : 500
Bit Depth                       : 8
Color Type                      : RGB with Alpha
Compression                     : Deflate/Inflate
Filter                          : Adaptive
Interlace                       : Noninterlaced
Background Color                : 255 255 255
Pixels Per Unit X               : 2835
Pixels Per Unit Y               : 2835
Pixel Units                     : Meters
Modify Date                     : 2013:11:03 15:35:11
Comment                         : Created with GIMP
Image Size                      : 500x500

--- New Image ---
ExifTool Version Number         : 9.04
File Name                       : noise.png
Directory                       : .
File Size                       : 585 bytes
File Modification Date/Time     : 2014:03:07 09:01:31+01:00
File Access Date/Time           : 2014:03:07 09:04:10+01:00
File Permissions                : rw-r--r--
File Type                       : PNG
MIME Type                       : image/png
Image Width                     : 500
Image Height                    : 500
Bit Depth                       : 8
Color Type                      : Grayscale with Alpha
Compression                     : Deflate/Inflate
Filter                          : Adaptive
Interlace                       : Noninterlaced
Pixels Per Unit X               : 39
Pixels Per Unit Y               : 39
Pixel Units                     : Meters
Image Size                      : 500x500

Here is my version: noise (Image is transparent, but present :)