bots: Drop obsolete vm-prep call attempt

vm-prep does not exist in any maintained branch any more.

bots/image-refresh

@@ -120,11 +120,6 @@ def run(image, verbose=False, **kwargs):
     # Cleanup any extraneous disk usage elsewhere
     subprocess.check_call([ os.path.join(BASE, "test", "vm-reset") ])
 
-    # Setup network if necessary, any failures caught during testing
-    prep = os.path.join(BASE, "test", "vm-prep")
-    if os.path.exists(prep):
-        subprocess.call(["sudo", "-n", prep ])
-
     cmd = [ os.path.join(BOTS, "image-create"), "--verbose", "--upload" ]
     if store:
         cmd += [ "--store", store ]

bots/tests-invoke

@@ -349,11 +349,6 @@ class PullTask(object):
         env = os.environ.copy()
         env["PATH"] = "{0}:{1}:{2}".format(env.get("PATH", "/bin:/sbin"), BOTS, test)
 
-        # Setup network if necessary, any failures caught during testing
-        prep = os.path.join(BASE, "test", "vm-prep")
-        if os.path.exists(prep):
-            subprocess.call(["sudo", "-n", prep ], env=env)
-
         # Prepare the image to run
         if not ret and prefix != "cockpit":
             ret = self.prepare(prefix, value, image, opts.verbose)