Update git submodules

* Update docs/submodules/qtip from branch 'stable/euphrates'
  - delete legacy code from branch stable/euphrates

    This directory doesn't need to publish in euphrates.

    Change-Id: I2d88b85c272ca3df6cc504e08968e9432e2dd96d
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 2508639..5d67fdf 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 25086394f9ebd7bd90698ea54734f27ee9d4517e
+Subproject commit 5d67fdf522b7ba460f8337e3c6cfea3b340c46f8