bug-14538: Remove driver validation checks

Marked validation checks done in the driver with
TODOVV. Once we verify the check is covered in a
validation layer we can remove the driver code.
diff --git a/layers/mem_tracker.cpp b/layers/mem_tracker.cpp
index d7e8316..49c65f1 100644
--- a/layers/mem_tracker.cpp
+++ b/layers/mem_tracker.cpp
@@ -2056,7 +2056,7 @@
                 if (!(fence_item->second.createInfo.flags & VK_FENCE_CREATE_SIGNALED_BIT)) {
                     log_msg(mdd(device), VK_DBG_REPORT_ERROR_BIT, VK_OBJECT_TYPE_FENCE, pFences[i].handle, 0, MEMTRACK_INVALID_FENCE_STATE, "MEM",
                             "Fence %#" PRIxLEAST64 " submitted to VkResetFences in UNSIGNALED STATE", pFences[i].handle);
-                    result = VK_ERROR_INVALID_VALUE;
+                    result = VK_ERROR_UNKNOWN;
                 }
                 else {
                     fence_item->second.createInfo.flags =