Remove i686 from arch=()

PKGBUILD

@@ -6,7 +6,7 @@ pkgname=(python-cairo python2-cairo)
 pkgver=1.15.4
 pkgrel=1
 pkgdesc="Python bindings for the cairo graphics library"
-arch=('i686' 'x86_64')
+arch=('x86_64')
 url="https://pycairo.readthedocs.io/en/latest/"
 license=('LGPL2.1' 'MPL')
 makedepends=(python python2 cairo git)