clang plugin: Remove enforce-in-pdf toggle.

tools/clang/plugins/ChromeClassTester.cpp

Index: tools/clang/plugins/ChromeClassTester.cpp
diff --git a/tools/clang/plugins/ChromeClassTester.cpp b/tools/clang/plugins/ChromeClassTester.cpp
index e8f1507447b92f39dfd8caa63a67ea744242df1d..cd508068e111399c0319dbebc49e707bd94fcea4 100644
--- a/tools/clang/plugins/ChromeClassTester.cpp
+++ b/tools/clang/plugins/ChromeClassTester.cpp
@@ -224,10 +224,6 @@ void ChromeClassTester::BuildBannedLists() {
     allowed_directories_.emplace("/third_party/WebKit/");
   }
 
-  if (!options_.enforce_in_pdf) {
-    banned_directories_.emplace("/pdf/");
-  }
-
   banned_directories_.emplace("/third_party/");
   banned_directories_.emplace("/native_client/");
   banned_directories_.emplace("/breakpad/");