[PackageKit] Remove upstreamed and no-longer-applied patches

[Richard Hughes]

commit ac481a59addb9c388fc0c7df9b37554620f616f2
Author: Richard Hughes <richard at hughsie.com>
Date:   Thu Jun 28 15:03:19 2012 +0100

    Remove upstreamed and no-longer-applied patches

 0001-Fix-importing-GPG-signatures.patch |   34 -------------
 PackageKit-0.7.4-yum-untrusted.patch    |   35 -------------
 null-is-not-a-string.patch              |   83 -------------------------------
 3 files changed, 0 insertions(+), 152 deletions(-)