[SimplifyCFG] Remove redundant checks for hoisting (NFCI)

These conditions are later checked in the HoistTerminator code
path. Checking them here is somewhat confusing, because this code
only checks the first instruction in the block, which is not
necessarily the terminator.

llvm/lib/Transforms/Utils/SimplifyCFG.cpp

@@ -1473,10 +1473,7 @@ bool SimplifyCFGOpt::HoistThenElseCodeToIf(BranchInst *BI,
     while (isa<DbgInfoIntrinsic>(I2))
       I2 = &*BB2_Itr++;
   }
-  // FIXME: Can we define a safety predicate for CallBr?
-  if (isa<PHINode>(I1) || !I1->isIdenticalToWhenDefined(I2) ||
-      (isa<InvokeInst>(I1) && !isSafeToHoistInvoke(BB1, BB2, I1, I2)) ||
-      isa<CallBrInst>(I1))
+  if (isa<PHINode>(I1) || !I1->isIdenticalToWhenDefined(I2))
     return false;
 
   BasicBlock *BIParent = BI->getParent();