Fixed a number of -Wcovered-switch-default diagnostics in tools/clang/include/clang/AST/AttrDump.inc

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
index 3651636..395347c 100644
--- a/utils/TableGen/ClangAttrEmitter.cpp
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -549,11 +549,6 @@
     }
     void writeDump(raw_ostream &OS) const {
       OS << "    switch(SA->get" << getUpperName() << "()) {\n";
-      OS << "    default:\n";
-      OS << "      llvm_unreachable(\"Unknown " << getAttrName() << "Attr::"
-         << type << "!\");\n";
-      OS << "      break;\n";
-
       for (std::vector<StringRef>::const_iterator I = uniques.begin(),
            E = uniques.end(); I != E; ++I) {
         OS << "    case " << getAttrName() << "Attr::" << *I << ":\n";