Revert "Add path interposer"

This reverts commit a14704c12b.

Reason for revert: breaking builds

Change-Id: I920b0ff41823428a0baf59b3fd82cbcc766babca

python/scripts/stub_template_host.txt

@@ -18,6 +18,8 @@ def SearchPathEnv(name):
   for directory in search_path:
     if directory == '': continue
     path = os.path.join(directory, name)
+    if os.path.islink(path):
+      path = os.path.realpath(path)
     # Check if path is actual executable file.
     if os.path.isfile(path) and os.access(path, os.X_OK):
       return path