Remove port from master-config.yml

This was the "systemd" approach on BuildBot services
for getting the PORT number.
Now that both environments run in docker containers, the port variable
is exposed to the container environment via docker-compose.

define_masters.py

@@ -27,7 +27,6 @@
 if os.path.exists(BASE_PATH):
     shutil.rmtree(BASE_PATH)
 
-IDX = 0
 for arch in platforms:
     # Create the directory for the architecture that is handled by each master
     # If for a given architecture there are more than "max_builds" builds,
@@ -47,13 +46,6 @@
         master_config["workers"] = config["private"]["master-variables"]["workers"][
             arch
         ]
-
-        starting_port = int(
-            os.getenv(
-                "PORT", default=config["private"]["master-variables"]["starting_port"]
-            )
-        )
-        master_config["port"] = starting_port + IDX
         master_config["log_name"] = (
             "master-docker-" + arch + "-" + str(master_id) + ".log"
         )
@@ -69,5 +61,4 @@
         )
         with open(dir_path + "/buildbot.tac", mode="w", encoding="utf-8") as f:
             f.write(buildbot_tac)
-        IDX += 1
     print(arch, len(master_config["builders"]))