Revert 332508 as it caused problems in the clang test suite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332555 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/Path.cpp

@@ -726,10 +726,6 @@ static SmallString<256> remove_dots(StringRef path, bool remove_dot_dot,
   SmallString<256> buffer = path::root_path(path, style);
   for (StringRef C : components)
     path::append(buffer, style, C);
-  // If the buffer is empty, then return ".". Many other path utilities
-  // do this so it seems to be an expected result.
-  if (buffer.empty())
-    buffer.append(1, '.');
   return buffer;
 }