Revert of Make gclient ready for the Blink (DEPS to main project) transition

scm.py

Index: scm.py
diff --git a/scm.py b/scm.py
index 94b925e87d0abf14762462607221a88f51316214..9bc96bc8055832707a749d3b9d256766b5a43956 100644
--- a/scm.py
+++ b/scm.py
@@ -441,16 +441,6 @@
       return GIT.Capture(['rev-parse', '--is-inside-work-tree'], cwd=cwd)
     except (OSError, subprocess2.CalledProcessError):
       return False
-
-  @staticmethod
-  def IsDirectoryVersioned(cwd, relative_dir):
-    """Checks whether the given |relative_dir| is part of cwd's repo."""
-    return bool(GIT.Capture(['ls-tree', 'HEAD', relative_dir], cwd=cwd))
-
-  @staticmethod
-  def CleanupDir(cwd, relative_dir):
-    """Cleans up untracked file inside |relative_dir|."""
-    return bool(GIT.Capture(['clean', '-df', relative_dir], cwd=cwd))
 
   @staticmethod
   def GetGitSvnHeadRev(cwd):