[build-presets] Don't build SwiftSyntax in linux preset

ahoppen · ahoppen · commit 421857b46e5d · 2019-11-11T09:50:07.000-08:00
The Ubuntu 16 package bot does not check out SwiftSyntax and therefore
can't build it.
diff --git a/utils/build-presets.ini b/utils/build-presets.ini
@@ -781,7 +781,6 @@ stress-test
 test-optimized
 foundation
 libdispatch
-swiftsyntax
 indexstore-db
 sourcekit-lsp
 lit-args=-v --time-tests
