Do not check for existence of exported dirs.

Test: header-abi-dumper -o example1.dump tests/input/example1.cpp -I foo -- -x c++
-std=c++11 -I .
-isystem <ToT>/prebuilts/clang/host/linux-x86/clang-3289846/bin/../lib64/clang/3.8/include'

foo does not exist, but header-abi-dumper does not fail. Does not filter
abi instead.

Bug: 37751423

Change-Id: Ie6f2d54ec3aa0ccc8c884122dbafc28383870fe5
diff --git a/vndk/tools/header-checker/header-abi-dumper/src/header_checker.cpp b/vndk/tools/header-checker/header-abi-dumper/src/header_checker.cpp
index 00045e5..217b21e 100644
--- a/vndk/tools/header-checker/header-abi-dumper/src/header_checker.cpp
+++ b/vndk/tools/header-checker/header-abi-dumper/src/header_checker.cpp
@@ -85,14 +85,6 @@
     ::exit(1);
   }
 
-  //Existential checks for exported dirs.
-  for (auto &&dir : exported_header_dirs) {
-    if (!llvm::sys::fs::exists(dir)) {
-      llvm::errs() << "ERROR: exported dir \"" << dir << "\" not found\n";
-      ::exit(1);
-    }
-  }
-
   // Check whether we can create compilation database and deduce compiler
   // options from command line options.
   if (!compilations) {