Remove i686 from arch=()

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u

1 files changed, 1 insertions, 1 deletions

diff --git a/PKGBUILD b/PKGBUILD
index 9f3a59aeff09..88d9f129be99 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -4,7 +4,7 @@ pkgname=gdlmm
 pkgver=3.7.3
 pkgrel=3
 pkgdesc='C++ bindings for the gdl library'
-arch=('x86_64' 'i686')
+arch=('x86_64')
 url='https://git.gnome.org/browse/gdlmm/'
 depends=('gdl' 'gtkmm3')
 options=('!emptydirs')