Revert "[SILOptimizer] Added MandatoryCombiner."

Author: eeckstein

include/swift/SILOptimizer/PassManager/Passes.def

@@ -36,7 +36,7 @@
 ///   This macro follows the same conventions as PASS(Id, Tag, Description),
 ///   but is used for IRGen passes which are built outside of the
 ///   SILOptimizer library.
-///
+///   
 ///   An IRGen pass is created by IRGen and needs to be registered with the pass
 ///   manager dynamically.
 #ifndef IRGEN_PASS
@@ -312,8 +312,6 @@ PASS(SerializeSILPass, "serialize-sil",
 PASS(YieldOnceCheck, "yield-once-check",
     "Check correct usage of yields in yield-once coroutines")
 PASS(OSLogOptimization, "os-log-optimization", "Optimize os log calls")
-PASS(MandatoryCombiner, "mandatory-combiner",
-    "Perform mandatory peephole combines")
 PASS(BugReducerTester, "bug-reducer-tester",
      "sil-bug-reducer Tool Testing by Asserting on a Sentinel Function")
 PASS_RANGE(AllPasses, AADumper, BugReducerTester)

lib/SILOptimizer/Mandatory/CMakeLists.txt

@@ -21,6 +21,5 @@ silopt_register_sources(
   SemanticARCOpts.cpp
   SILGenCleanup.cpp
   YieldOnceCheck.cpp
-  MandatoryCombiner.cpp
   OSLogOptimization.cpp
 )