[InstCombine][nfc] Remove dead invoke inst check in foldOpIntoPhi

There's a check above the pred block is terminated with an unconditional
branch, so this code is unreachable.

Author: c-rhodes

llvm/lib/Transforms/InstCombine/InstructionCombining.cpp

@@ -1968,12 +1968,6 @@ Instruction *InstCombinerImpl::foldOpIntoPhi(Instruction &I, PHINode *PN,
     NewPhiValues.push_back(nullptr);
     OpsToMoveUseToIncomingBB.push_back(i);
 
-    // If the InVal is an invoke at the end of the pred block, then we can't
-    // insert a computation after it without breaking the edge.
-    if (isa<InvokeInst>(InVal))
-      if (cast<Instruction>(InVal)->getParent() == InBB)
-        return nullptr;
-
     // Do not push the operation across a loop backedge. This could result in
     // an infinite combine loop, and is generally non-profitable (especially
     // if the operation was originally outside the loop).