Remove a leak. Destroy LoopInfoBase object. releaseMemory() is actually called in its dtor.

llvm-svn: 44317

llvm/include/llvm/Analysis/LoopInfo.h

@@ -834,7 +834,7 @@ public:
     LI = new LoopInfoBase<BasicBlock>();
   }
   
-  ~LoopInfo() { LI->releaseMemory(); }
+  ~LoopInfo() { delete LI; }
 
   /// iterator/begin/end - The interface to the top-level loops in the current
   /// function.