search for the armature in the tree view on the top right
just delete it

you can make certain objects disapear by clicking on the eye togle in the upper right part of blender tree view

in the render tab camera

change the resolution and quality 100%

for picture make resolution 380x380
for icon make resolution 32x32

(press space and type in opengl and press enter)

press F11 to get into OpenGL render active viewport

press F3 to make the picture

now just scale it down in gimp