[flang] Remove a leftover debugging message. (#108175)

Author: abidh

flang/lib/Semantics/expression.cpp

@@ -2744,7 +2744,6 @@ std::pair<const Symbol *, bool> ExpressionAnalyzer::ResolveGeneric(
               (!procedure->IsElemental() && nonElemental)) {
             int d{ComputeCudaMatchingDistance(
                 context_.languageFeatures(), *procedure, localActuals)};
-            llvm::errs() << "matching distance: " << d << "\n";
             if (d != crtMatchingDistance) {
               if (d > crtMatchingDistance) {
                 continue;