Remove unnecessary include path

Change-Id: I07314e9a4827e44547a2bcc0d00ffacfb135cadc
Reviewed-on: https://weave-review.googlesource.com/1191
Reviewed-by: Alex Vakulenko <avakulenko@google.com>

libweave/libweave_common.gypi

diff --git a/libweave/libweave_common.gypi b/libweave/libweave_common.gypi
index c6bdd78..a290f7e 100644
--- a/libweave/libweave_common.gypi
+++ b/libweave/libweave_common.gypi
@@ -20,7 +20,6 @@
     },
     'include_dirs': [
       '.',
-      '..',
       'include',
       'external',
       'third_party/include',