Clean up rustdoc run

1. The options specified in `rustdoc-with-private` are essentially the
   default now so we can remove this script.
2. `./mach browse-doc` is redundant with `./mach doc --open` which uses
   the underlying cargo functionality to browse the documentation.

Fixes #29888.

python/servo/command_base.py

@@ -10,7 +10,7 @@
 from __future__ import print_function
 
 import contextlib
-from typing import Optional
+from typing import List, Optional
 import distro
 import functools
 import gzip
@@ -616,11 +616,7 @@ class CommandBase(object):
         if hosts_file_path:
             env['HOST_FILE'] = hosts_file_path
 
-        if not test_unit:
-            # This wrapper script is in bash and doesn't work on Windows
-            # where we want to run doctests as part of `./mach test-unit`
-            env['RUSTDOC'] = path.join(self.context.topdir, 'etc', 'rustdoc-with-private')
-        elif "msvc" in servo.platform.host_triple():
+        if test_unit and "msvc" in servo.platform.host_triple():
             # on MSVC, we need some DLLs in the path. They were copied
             # in to the servo.exe build dir, so just point PATH to that.
             util.prepend_paths_to_env(env, "PATH", path.dirname(self.get_binary_path(False, False)))
@@ -824,7 +820,7 @@ class CommandBase(object):
         self.features += ["media-" + media_stack]
 
     def run_cargo_build_like_command(
-        self, command, cargo_args,
+        self, command: str, cargo_args: List[str],
         env=None, verbose=False,
         libsimpleservo=False,
         debug_mozjs=False, with_debug_assertions=False,

python/servo/post_build_commands.py

@@ -14,6 +14,7 @@ import os
 import os.path as path
 import subprocess
 from shutil import copytree, rmtree, copy2
+from typing import List
 
 import servo.util
 
@@ -242,7 +243,7 @@ class PostBuildCommands(CommandBase):
         'params', nargs='...',
         help="Command-line arguments to be passed through to cargo doc")
     @CommandBase.build_like_command_arguments
-    def doc(self, params, **kwargs):
+    def doc(self, params: List[str], **kwargs):
         self.ensure_bootstrapped(rustup_components=["rust-docs"])
         rustc_path = check_output(
             ["rustup" + BIN_SUFFIX, "which", "--toolchain", self.rust_toolchain(), "rustc"]
@@ -278,12 +279,3 @@ class PostBuildCommands(CommandBase):
         static = path.join(self.context.topdir, "etc", "doc.servo.org")
         for name in os.listdir(static):
             copy2(path.join(static, name), path.join(docs, name))
-
-    @Command('browse-doc',
-             description='Generate documentation and open it in a web browser',
-             category='post-build')
-    def serve_docs(self):
-        self.doc([])
-        import webbrowser
-        webbrowser.open("file://" + path.abspath(path.join(
-            servo.util.get_target_dir(), "doc", "servo", "index.html")))