[thunderbird-lightning/el6] Drop BR libvpx

[Orion Poplawski]

commit 01008d16de9ef536693ce6cb3224e31854bf2f86
Author: Orion Poplawski <orion at cora.nwra.com>
Date:   Sat Dec 14 12:57:18 2013 -0700

    Drop BR libvpx

 thunderbird-lightning.spec |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/thunderbird-lightning.spec b/thunderbird-lightning.spec
index 944c5b7..52335b2 100644
--- a/thunderbird-lightning.spec
+++ b/thunderbird-lightning.spec
@@ -97,7 +97,6 @@ BuildRequires:  libcurl-devel
 BuildRequires:  python
 BuildRequires:  yasm
 BuildRequires:  mesa-libGL-devel
-BuildRequires:  libvpx-devel >= %{libvpx_version}
 Requires:       thunderbird >= %{thunderbird_version}
 Requires:       thunderbird < %{thunderbird_next_version}
 Obsoletes:      thunderbird-lightning-wcap <= 0.8