Remove reference to non-existent symbol

This fixes compilation in recent clang versions (tested against
llvm/llvm-project@6443c0e) which is apparently
stricter with respect to undefined symbols. It appears that this version
script reference was never correct.

Author: tamird

va/libva.syms

@@ -6,6 +6,4 @@ VA_API_0.32.0 {
 VA_API_0.33.0 {
     global:
         vaCreateSurfaces;
-    local:
-        vaCreateSurfaces_0_33_0;
 } VA_API_0.32.0;