Eliminate port server env var, force its use always, consolidate code
diff --git a/build.yaml b/build.yaml
index 5782afb..911e6cd 100644
--- a/build.yaml
+++ b/build.yaml
@@ -610,10 +610,8 @@
- test/core/util/mock_endpoint.c
- test/core/util/parse_hexstring.c
- test/core/util/passthru_endpoint.c
- - test/core/util/port_posix.c
+ - test/core/util/port.c
- test/core/util/port_server_client.c
- - test/core/util/port_uv.c
- - test/core/util/port_windows.c
- test/core/util/slice_splitter.c
- test/core/util/trickle_endpoint.c
deps: