[libFuzzer] minor refactoring, NFC

llvm-svn: 313406
diff --git a/compiler-rt/lib/fuzzer/FuzzerDriver.cpp b/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
index 804f426..cc99534 100644
--- a/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
@@ -471,9 +471,8 @@
     // Get coverage for the testcase without modifications.
     F->ExecuteCallback(C.data(), C.size());
     InitialFeatures.clear();
-    TPC.CollectFeatures([&](size_t Feature) -> bool {
+    TPC.CollectFeatures([&](size_t Feature) {
       InitialFeatures.push_back(Feature);
-      return true;
     });
 
     for (size_t i = 0; i < Dict.size(); ++i) {
@@ -498,9 +497,8 @@
       // Get coverage for testcase with masked occurrences of dictionary unit.
       F->ExecuteCallback(Data.data(), Data.size());
       ModifiedFeatures.clear();
-      TPC.CollectFeatures([&](size_t Feature) -> bool {
+      TPC.CollectFeatures([&](size_t Feature) {
         ModifiedFeatures.push_back(Feature);
-        return true;
       });
 
       if (InitialFeatures == ModifiedFeatures)