Bug 1804178 - [4/6] Remove pytoml output postprocessing r=glandium

The postprocessing phase that cleaned up `pytoml`'s output has little
effect on `toml`'s output, which is already largely clean. Remove the
additional code.

Differential Revision: https://phabricator.services.mozilla.com/D164153

.cargo/config.in

@@ -115,6 +115,7 @@ git = "https://github.com/smol-rs/async-task"
 rev = "f6488e35beccb26eb6e85847b02aa78a42cd3d0e"
 replace-with = "vendored-sources"
 
+
 # Take advantage of the fact that cargo will treat lines starting with #
 # as comments to add preprocessing directives. This file can thus by copied
 # as-is to $topsrcdir/.cargo/config with no preprocessing to be used there

python/mozbuild/mozbuild/vendor/vendor_rust.py

@@ -885,22 +885,11 @@ license file's hash.
             mozpath.normsep(os.path.normcase(self.topsrcdir)),
         )
 
-        # Normalize pytoml output:
-        # - removing empty lines
-        # - remove empty [section]
-        def toml_dump(data):
-            dump = toml.dumps(data)
-            if isinstance(data, dict):
-                for k, v in data.items():
-                    if all(isinstance(v2, dict) for v2 in v.values()):
-                        dump = dump.replace("[%s]" % k, "")
-            return dump.strip()
-
         cargo_config = os.path.join(self.topsrcdir, ".cargo", "config.in")
         with open(cargo_config, "w", encoding="utf-8", newline="\n") as fh:
             fh.write(
                 CARGO_CONFIG_TEMPLATE.format(
-                    config=toml_dump(config),
+                    config=toml.dumps(config),
                     replace_name=replace_name,
                     directory=replace["directory"],
                 )