Revert "feat(controller): make Procfile mandatory"

This reverts commit b81f4a85abc2ea3980d998a0bebde812e4c53ae4.

Author: Matthew Fisher

api/models.py

@@ -258,7 +258,7 @@ def _get_scheduler(self):
     def _get_command(self):
         c_type = self.type
         if c_type:
-            return "cat Procfile | grep ^{c_type} | cut -f 1 -d ' ' --complement | sh -"
+            return 'start {c_type}'
         else:
             return ''