Remove old Clang plugin flags.

tools/clang/plugins/FindBadConstructsAction.cpp

Index: tools/clang/plugins/FindBadConstructsAction.cpp
diff --git a/tools/clang/plugins/FindBadConstructsAction.cpp b/tools/clang/plugins/FindBadConstructsAction.cpp
index 3fedd8feb088df2a5eb4f972c175e36e7c37a384..8a370234a0ac9e2a28fc55acf56c211f2846a839 100644
--- a/tools/clang/plugins/FindBadConstructsAction.cpp
+++ b/tools/clang/plugins/FindBadConstructsAction.cpp
@@ -47,9 +47,6 @@ bool FindBadConstructsAction::ParseArgs(const CompilerInstance& instance,
     if (args[i] == "check-base-classes") {
       // TODO(rsleevi): Remove this once http://crbug.com/123295 is fixed.
       options_.check_base_classes = true;
-    } else if (args[i] == "enforce-in-pdf") {
-      // TODO(thestig): This is now always on. Remove support for this flag once
-      // the build no longer passes it in.
     } else if (args[i] == "enforce-in-thirdparty-webkit") {
       options_.enforce_in_thirdparty_webkit = true;
     } else if (args[i] == "check-enum-last-value") {