Remove tizen jobs as valid pr jobs (dotnet#21982)

Jarret Shook · web-flow · commit 8ede2d4f5d85 · 2019-01-14T10:11:37.000-08:00
diff --git a/netci.groovy b/netci.groovy
@@ -221,11 +221,6 @@ class Constants {
             'x64': [
                 'Checked'
             ]
-        ],
-        'Tizen': [
-            'armem': [
-                'Checked'
-            ]
         ]
     ]
 
