Auto merge of #10013 - malayaleecoder:master, r=Wafflespeanut

Remove submodule update from mach bootstrap. Fixes #10010

Tries to fix #10010 . Please have a look.

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/10013)
<!-- Reviewable:end -->

python/servo/bootstrap_commands.py

@@ -15,12 +15,10 @@ import os
 import os.path as path
 import re
 import shutil
-import subprocess
 import sys
 import StringIO
 import tarfile
 import urllib2
-from distutils.version import LooseVersion
 
 from mach.decorators import (
     CommandArgument,
@@ -28,7 +26,7 @@ from mach.decorators import (
     Command,
 )
 
-from servo.command_base import CommandBase, cd, host_triple, check_call, BIN_SUFFIX
+from servo.command_base import CommandBase, host_triple, BIN_SUFFIX
 
 
 def download(desc, src, writer):
@@ -280,36 +278,6 @@ class MachCommands(CommandBase):
             print("Unable to parse chromium HSTS preload list, has the format changed?")
             sys.exit(1)
 
-    @Command('update-submodules',
-             description='Update submodules',
-             category='bootstrap')
-    def update_submodules(self):
-        # Ensure that the installed git version is >= 1.8.1
-        gitversion_output = subprocess.check_output(["git", "--version"])
-        gitversion = LooseVersion(gitversion_output.split(" ")[-1])
-        if gitversion < LooseVersion("1.8.1"):
-            print("Git version 1.8.1 or above required. Current version is {}"
-                  .format(gitversion))
-            sys.exit(1)
-        submodules = subprocess.check_output(["git", "submodule", "status"])
-        for line in submodules.split('\n'):
-            components = line.strip().split(' ')
-            if len(components) > 1:
-                module_path = components[1]
-                if path.exists(module_path):
-                    with cd(module_path):
-                        output = subprocess.check_output(
-                            ["git", "status", "--porcelain"])
-                        if len(output) != 0:
-                            print("error: submodule %s is not clean"
-                                  % module_path)
-                            print("\nClean the submodule and try again.")
-                            return 1
-        check_call(
-            ["git", "submodule", "--quiet", "sync", "--recursive"])
-        check_call(
-            ["git", "submodule", "update", "--init", "--recursive"])
-
     @Command('clean-nightlies',
              description='Clean unused nightly builds of Rust and Cargo',
              category='bootstrap')

python/servo/command_base.py

@@ -401,8 +401,6 @@ class CommandBase(object):
         if self.context.bootstrapped:
             return
 
-        Registrar.dispatch("update-submodules", context=self.context)
-
         if not self.config["tools"]["system-rust"] and \
            (not path.exists(path.join(
                             self.config["tools"]["rust-root"], "rustc", "bin", "rustc" + BIN_SUFFIX)) or