Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "delete unuse code in directory /qtip"
  - delete unuse code in directory /qtip

    Change-Id: I6732c7cf572d5b744c3a176ce266b9739e9233fd
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 30bedcb..73b0a82 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 30bedcbde528b832357a296091816cf5e52031cd
+Subproject commit 73b0a82bdff1c53846c8cd99475ba3a58b0fdca4