remove cotinue

lib/worker_multibuild.py

@@ -85,9 +85,7 @@ def _get_dockerfile_contents(jobname, os_codename='bionic'):
             if inside_allowed_command:
                 res += line
                 l = line.strip()
-                if l.endswith("\\") or l.endswith("\\\n"):
-                    continue
-                else:
+                if not l.endswith("\\"):
                     inside_allowed_command = False
 
     return res + dockerfile_extra_contents[os_codename]