AST: Don't print cached request values when dumping dependencies

This becomes tricky with the new per-request cache representation.

We can add it back later if we need it, but I feel like this code
path isn't particularly useful right now anyway.

Author: slavapestov

lib/AST/Evaluator.cpp

@@ -148,13 +148,6 @@ void Evaluator::printDependencies(
     out.resetColor();
   }
 
-  // Print the cached value, if known.
-  auto cachedValue = cache.find(request);
-  if (cachedValue != cache.end()) {
-    out << " -> ";
-    printEscapedString(cachedValue->second.getAsString(), out);
-  }
-
   if (!visitedAnywhere.insert(request).second) {
     // We've already seed this node. Check whether it's part of a cycle.
     if (std::find(visitedAlongPath.begin(), visitedAlongPath.end(), request)
@@ -313,11 +306,6 @@ void Evaluator::printDependenciesGraphviz(llvm::raw_ostream &out) const {
     out << " [label=\"";
     printEscapedString(request.getAsString(), out);
 
-    auto cachedValue = cache.find(request);
-    if (cachedValue != cache.end()) {
-      out << " -> ";
-      printEscapedString(cachedValue->second.getAsString(), out);
-    }
     out << "\"";
 
     if (auto color = getColor(request)) {

unittests/AST/ArithmeticEvaluator.cpp

@@ -265,8 +265,8 @@ TEST(ArithmeticEvaluator, Simple) {
   }
 
   EXPECT_EQ(productDependencies,
-    " `--InternallyCachedEvaluationRule(Binary: product) -> 2.461145e+02\n"
-    "     `--InternallyCachedEvaluationRule(Binary: sum) -> 5.859870e+00\n"
+    " `--InternallyCachedEvaluationRule(Binary: product)\n"
+    "     `--InternallyCachedEvaluationRule(Binary: sum)\n"
     "     |   `--InternallyCachedEvaluationRule(Literal: 3.141590e+00)\n"
     "     |   `--InternallyCachedEvaluationRule(Literal: 2.718280e+00)\n"
     "     `--InternallyCachedEvaluationRule(Literal: 4.200000e+01)\n");
@@ -311,8 +311,8 @@ TEST(ArithmeticEvaluator, Simple) {
     "  request_2 [label=\"ExternallyCachedEvaluationRule(Literal: 2.718280e+00)\"];\n"
     "  request_3 [label=\"ExternallyCachedEvaluationRule(Literal: 3.141590e+00)\"];\n"
     "  request_4 [label=\"ExternallyCachedEvaluationRule(Literal: 4.200000e+01)\"];\n"
-    "  request_5 [label=\"InternallyCachedEvaluationRule(Binary: product) -> 2.461145e+02\"];\n"
-    "  request_6 [label=\"InternallyCachedEvaluationRule(Binary: sum) -> 5.859870e+00\"];\n"
+    "  request_5 [label=\"InternallyCachedEvaluationRule(Binary: product)\"];\n"
+    "  request_6 [label=\"InternallyCachedEvaluationRule(Binary: sum)\"];\n"
     "  request_7 [label=\"InternallyCachedEvaluationRule(Literal: 2.718280e+00)\"];\n"
     "  request_8 [label=\"InternallyCachedEvaluationRule(Literal: 3.141590e+00)\"];\n"
     "  request_9 [label=\"InternallyCachedEvaluationRule(Literal: 4.200000e+01)\"];\n"