Remove the AssumptionCache

After r289755, the AssumptionCache is no longer needed. Variables affected by
assumptions are now found by using the new operand-bundle-based scheme. This
new scheme is more computationally efficient, and also we need much less
code...

llvm-svn: 289756
diff --git a/llvm/unittests/Analysis/ScalarEvolutionTest.cpp b/llvm/unittests/Analysis/ScalarEvolutionTest.cpp
index 752cc81..eded23e 100644
--- a/llvm/unittests/Analysis/ScalarEvolutionTest.cpp
+++ b/llvm/unittests/Analysis/ScalarEvolutionTest.cpp
@@ -9,7 +9,6 @@
 
 #include "llvm/Analysis/ScalarEvolutionExpander.h"
 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
-#include "llvm/Analysis/AssumptionCache.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/ADT/SmallVector.h"
@@ -38,17 +37,15 @@
   TargetLibraryInfoImpl TLII;
   TargetLibraryInfo TLI;
 
-  std::unique_ptr<AssumptionCache> AC;
   std::unique_ptr<DominatorTree> DT;
   std::unique_ptr<LoopInfo> LI;
 
   ScalarEvolutionsTest() : M("", Context), TLII(), TLI(TLII) {}
 
   ScalarEvolution buildSE(Function &F) {
-    AC.reset(new AssumptionCache(F));
     DT.reset(new DominatorTree(F));
     LI.reset(new LoopInfo(*DT));
-    return ScalarEvolution(F, TLI, *AC, *DT, *LI);
+    return ScalarEvolution(F, TLI, *DT, *LI);
   }
 
   void runWithFunctionAndSE(