Remove a whole lot of unused variables

There are about 30 removed in this patch, generated by a new FixIt I haven't
got round to submitting yet.

llvm-svn: 195814
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 8cfaa6c..d61a8e9 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1177,7 +1177,7 @@
 
   // Construct the actions to perform.
   ActionList LinkerInputs;
-  ActionList SplitInputs;
+
   llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PL;
   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
     types::ID InputType = Inputs[i].first;