Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to e93b3251120e3bc8aeec497852a287a5c909d1b4
  - AAPC-1655

    The imports part of a file should be handled by the Integrated Development Environment (IDE), not manually by the developer.
    Unused and useless imports should not occur if that is the case.
    Leaving them in reduces the code's readability, since their presence can be confusing.

    Issue-ID: APPC-1655
    Change-Id: I64e50083b9b0fe40fa0ba32723e30adb0dbce08e
    Signed-off-by: Dasari Anusha <danush10@in.ibm.com>
    Signed-off-by: anushadasari <danush10@in.ibm.com>

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 93d4ad2..e93b325 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 93d4ad294dc08226467e4203c2044c62d32d9c1c
+Subproject commit e93b3251120e3bc8aeec497852a287a5c909d1b4