Remove unnecessary dependency on openmotif

Requirement was an artifact of older version of mesa, and is no longer necessary.
diff --git a/contrib/packages/rpm/el5/SPECS/tigervnc.spec b/contrib/packages/rpm/el5/SPECS/tigervnc.spec
index 41482ca..f7cc0db 100644
--- a/contrib/packages/rpm/el5/SPECS/tigervnc.spec
+++ b/contrib/packages/rpm/el5/SPECS/tigervnc.spec
@@ -120,8 +120,6 @@
 BuildRequires: kernel-headers, libatomic_ops-devel
 BuildRequires: xz
 
-BuildRequires: openmotif-devel
-Requires: openmotif, openmotif22
 Requires(post): initscripts chkconfig coreutils
 Requires(postun):coreutils
 Requires: hicolor-icon-theme
diff --git a/contrib/packages/rpm/el6/SPECS/tigervnc.spec b/contrib/packages/rpm/el6/SPECS/tigervnc.spec
index d0e6557..1e846b5 100644
--- a/contrib/packages/rpm/el6/SPECS/tigervnc.spec
+++ b/contrib/packages/rpm/el6/SPECS/tigervnc.spec
@@ -36,8 +36,6 @@
 BuildRequires: xorg-x11-server-devel
 %endif
 
-BuildRequires: openmotif-devel
-Requires: openmotif, openmotif22
 Requires(post): initscripts chkconfig coreutils
 Requires(postun): coreutils
 Requires: libjpeg-turbo