Removed duplicate config

[radarhere]

It seems to me that if all files by indent_size = 4 by default,

Pillow/.editorconfig

Lines 4 to 11 in 3e3378f

	[*]
	# Unix-style newlines with a newline ending every file
	end_of_line = lf
	insert_final_newline = true
	charset = utf-8
	# Four-space indentation
	indent_size = 4

then we don't need to specify that RST files do as well.

Pillow/.editorconfig

Lines 16 to 18 in 3e3378f

	[*.rst]
	# Four-space indentation
	indent_size = 4