Remove unused code from infra/scripts/legacy

infra/scripts/legacy/scripts/slave/build_directory.py

Index: infra/scripts/legacy/scripts/slave/build_directory.py
diff --git a/infra/scripts/legacy/scripts/slave/build_directory.py b/infra/scripts/legacy/scripts/slave/build_directory.py
index d7aa35b378dbd1acada18b5609d37693c02cd1e0..d0686f551c6160cc07069308676a6e65dc5c679e 100644
--- a/infra/scripts/legacy/scripts/slave/build_directory.py
+++ b/infra/scripts/legacy/scripts/slave/build_directory.py
@@ -33,20 +33,6 @@ def AreNinjaFilesNewerThanXcodeFiles(src_dir=None):
   return IsFileNewerThanFile(ninja_path, xcode_path)
 
 
-def AreNinjaFilesNewerThanMSVSFiles(src_dir=None):
-  """Returns True if the generated ninja files are newer than the generated
-  msvs files.
-
-  Parameters:
-    src_dir: The path to the src directory.  If None, it's assumed to be
-             at src/ relative to the current working directory.
-  """
-  src_dir = src_dir or 'src'
-  ninja_path = os.path.join(src_dir, 'out', 'Release', 'build.ninja')
-  msvs_path = os.path.join(src_dir, 'build', 'all.sln')
-  return IsFileNewerThanFile(ninja_path, msvs_path)
-
-
 def GetBuildOutputDirectory(src_dir=None, cros_board=None):
   """Returns the path to the build directory, relative to the checkout root.
 
@@ -71,41 +57,6 @@ def GetBuildOutputDirectory(src_dir=None, cros_board=None):
     return os.path.join(src_dir, 'xcodebuild')
 
   if sys.platform == 'cygwin' or sys.platform.startswith('win'):
-    if AreNinjaFilesNewerThanMSVSFiles(src_dir):
-      return os.path.join(src_dir, 'out')
-    return os.path.join(src_dir, 'build')
+    return os.path.join(src_dir, 'out')
 
   raise NotImplementedError('Unexpected platform %s' % sys.platform)
-
-
-def RmtreeExceptNinjaOrGomaFiles(build_output_dir):
-  """Recursively removes everything but ninja files from a build directory."""
-  for root, _, files in os.walk(build_output_dir, topdown=False):
-    for f in files:
-      # For .manifest in particular, gyp windows ninja generates manifest
-      # files at generation time but clobber nukes at the beginning of
-      # compile, so make sure not to delete those generated files, otherwise
-      # compile will fail.
-      if (f.endswith('.ninja') or f.endswith('.manifest') or
-          f == 'args.gn' or
-          f.startswith('msvc') or  # VS runtime DLLs.
-          f.startswith('pgort') or  # VS PGO runtime DLL.
-          f in ('gyp-mac-tool', 'gyp-win-tool',
-                'environment.x86', 'environment.x64')):
-        continue
-      # Keep goma related files.
-      if f == '.goma_deps':
-        continue
-      os.unlink(os.path.join(root, f))
-    # Delete the directory if empty; this works because the walk is bottom-up.
-    try:
-      os.rmdir(root)
-    except OSError, e:
-      if e.errno in (39, 41, 66):
-        # If the directory isn't empty, ignore it.
-        # On Windows, os.rmdir will raise WindowsError with winerror 145,
-        # which e.errno is 41.
-        # On Linux, e.errno is 39.
-        pass
-      else:
-        raise