stx-preferred-vers: remove invalid preferred version

Remove the preferred version "1.0.2" for python-sqlalchemy
which is invalid or there is warning:
WARNING: versions of python-sqlalchemy available: 1.0.16 1.1.17 1.1.5

Issue-ID: INF-64
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Change-Id: Id749f5b1ea4bad78438f7b38658d46dd8fecb529
diff --git a/meta-stx/conf/distro/include/stx-preferred-vers.inc b/meta-stx/conf/distro/include/stx-preferred-vers.inc
index 7310247..81f949b 100644
--- a/meta-stx/conf/distro/include/stx-preferred-vers.inc
+++ b/meta-stx/conf/distro/include/stx-preferred-vers.inc
@@ -51,7 +51,6 @@
 PREFERRED_VERSION_python-pysnmp = "4.2.5"
 PREFERRED_VERSION_python-dateutil = "2.8.1"
 PREFERRED_VERSION_python-adal = "1.0.2"
-PREFERRED_VERSION_python-sqlalchemy = "1.0.2"
 PREFERRED_VERSION_python-osprofiler = "2.3.0+%"
 PREFERRED_VERSION_python-amqp = "2.5.2"
 PREFERRED_VERSION_python-ryu = "4.24+%"