Silence a couple release build warnings about unused variables.

Author: rudkx

lib/SILOptimizer/FunctionSignatureTransforms/FunctionSignatureOpts.cpp

@@ -185,9 +185,8 @@ FunctionSignatureTransformDescriptor::createOptimizedSILFunctionName() {
     Mangler.setReturnValueOwnedToUnowned();
   }
 
-  SILModule &M = F->getModule();
   auto MangledName = Mangler.mangle();
-  assert(!M.hasFunction(MangledName));
+  assert(!F->getModule().hasFunction(MangledName));
 
   return MangledName;
 }

lib/Sema/CSApply.cpp

@@ -5737,6 +5737,7 @@ Expr *ExprRewriter::coerceCallArguments(
 
   assert((matchCanFail || !failed) && "Call arguments did not match up?");
   (void)failed;
+  (void)matchCanFail;
 
   // We should either have parentheses or a tuple.
   auto *argTuple = dyn_cast<TupleExpr>(arg);