Revert 373538 and follow-ups 373549 and 373552.

They break tests on (at least) macOS.

llvm-svn: 373556
diff --git a/clang/test/InterfaceStubs/class-template-specialization.cpp b/clang/test/InterfaceStubs/class-template-specialization.cpp
index 0a68d3f..29e4593 100644
--- a/clang/test/InterfaceStubs/class-template-specialization.cpp
+++ b/clang/test/InterfaceStubs/class-template-specialization.cpp
@@ -1,9 +1,9 @@
 // REQUIRES: x86-registered-target
-// RUN: %clang -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs -emit-merged-ifs \
+// RUN: %clang -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
 // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
 // RUN: FileCheck -check-prefix=CHECK-TAPI %s
 
-// RUN: %clang -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs -emit-merged-ifs \
+// RUN: %clang -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
 // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
 // RUN: FileCheck -check-prefix=CHECK-TAPI2 %s
 // RUN: %clang -target x86_64-unknown-linux-gnu -o - -c %s | \