Remove duplicate cmake setup for skip mode

Change-Id: Ia790b7f12cf78f628e99bb7fe2e272771c1a68c7

build/cmake/aom_experiment_deps.cmake

diff --git a/build/cmake/aom_experiment_deps.cmake b/build/cmake/aom_experiment_deps.cmake
index 5e8bba7..e39d66e 100644
--- a/build/cmake/aom_experiment_deps.cmake
+++ b/build/cmake/aom_experiment_deps.cmake
@@ -137,12 +137,6 @@
     endif  ()
   endif ()
 
-  if (CONFIG_EXT_SKIP)
-    if (NOT CONFIG_FRAME_MARKER)
-      change_config_and_warn(CONFIG_FRAME_MARKER 1 CONFIG_EXT_SKIP)
-    endif ()
-  endif ()
-
   if (CONFIG_LPF_SB)
     if (CONFIG_LOOPFILTER_LEVEL)
       change_config_and_warn(CONFIG_LOOPFILTER_LEVEL 0 CONFIG_LPF_SB)