diff --git a/llvm/lib/Fuzzer/FuzzerDriver.cpp b/llvm/lib/Fuzzer/FuzzerDriver.cpp
index 386caef..4e559b4 100644
--- a/llvm/lib/Fuzzer/FuzzerDriver.cpp
+++ b/llvm/lib/Fuzzer/FuzzerDriver.cpp
@@ -293,9 +293,6 @@
     Options.MaxNumberOfRuns = Flags.runs;
   if (!Inputs->empty())
     Options.OutputCorpus = (*Inputs)[0];
-  if (Flags.sync_command)
-    Options.SyncCommand = Flags.sync_command;
-  Options.SyncTimeout = Flags.sync_timeout;
   Options.ReportSlowUnits = Flags.report_slow_units;
   if (Flags.artifact_prefix)
     Options.ArtifactPrefix = Flags.artifact_prefix;
@@ -307,7 +304,8 @@
       return 1;
   if (Flags.verbosity > 0 && !Dictionary.empty())
     Printf("Dictionary: %zd entries\n", Dictionary.size());
-  Options.SaveArtifacts = !Flags.test_single_input;
+  bool DoPlainRun = AllInputsAreFiles();
+  Options.SaveArtifacts = !DoPlainRun;
   Options.PrintNewCovPcs = Flags.print_new_cov_pcs;
   Options.PrintFinalStats = Flags.print_final_stats;
 
@@ -337,12 +335,8 @@
   if (Flags.handle_fpe) SetSigFpeHandler();
   if (Flags.handle_int) SetSigIntHandler();
 
-  if (Flags.test_single_input) {
-    RunOneTest(&F, Flags.test_single_input);
-    exit(0);
-  }
-
-  if (AllInputsAreFiles()) {
+  if (DoPlainRun) {
+    Options.SaveArtifacts = false;
     int Runs = std::max(1, Flags.runs);
     Printf("%s: Running %zd inputs %d time(s) each.\n", ProgName->c_str(),
            Inputs->size(), Runs);
diff --git a/llvm/lib/Fuzzer/FuzzerFlags.def b/llvm/lib/Fuzzer/FuzzerFlags.def
index caf3d55..f794d32 100644
--- a/llvm/lib/Fuzzer/FuzzerFlags.def
+++ b/llvm/lib/Fuzzer/FuzzerFlags.def
@@ -52,16 +52,11 @@
 FUZZER_FLAG_INT(reload, 1,
                 "Reload the main corpus periodically to get new units"
                 " discovered by other processes.")
-FUZZER_FLAG_STRING(sync_command, "Execute an external command "
-                                 "\"<sync_command> <test_corpus>\" "
-                                 "to synchronize the test corpus.")
-FUZZER_FLAG_INT(sync_timeout, 600, "Minimum timeout between syncs.")
 FUZZER_FLAG_INT(report_slow_units, 10,
     "Report slowest units if they run for more than this number of seconds.")
 FUZZER_FLAG_INT(only_ascii, 0,
                 "If 1, generate only ASCII (isprint+isspace) inputs.")
 FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
-FUZZER_FLAG_STRING(test_single_input, "Use specified file as test input.")
 FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
                                     "timeout, or slow inputs) as "
                                     "$(artifact_prefix)file")
@@ -82,5 +77,9 @@
 FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
 FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
 FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
+
 FUZZER_DEPRECATED_FLAG(exit_on_first)
 FUZZER_DEPRECATED_FLAG(save_minimized_corpus)
+FUZZER_DEPRECATED_FLAG(sync_command)
+FUZZER_DEPRECATED_FLAG(sync_timeout)
+FUZZER_DEPRECATED_FLAG(test_single_input)
diff --git a/llvm/lib/Fuzzer/FuzzerInternal.h b/llvm/lib/Fuzzer/FuzzerInternal.h
index 29a0050..5c6abc7 100644
--- a/llvm/lib/Fuzzer/FuzzerInternal.h
+++ b/llvm/lib/Fuzzer/FuzzerInternal.h
@@ -290,11 +290,9 @@
     bool ShuffleAtStartUp = true;
     int PreferSmallDuringInitialShuffle = -1;
     size_t MaxNumberOfRuns = ULONG_MAX;
-    int SyncTimeout = 600;
     int ReportSlowUnits = 10;
     bool OnlyASCII = false;
     std::string OutputCorpus;
-    std::string SyncCommand;
     std::string ArtifactPrefix = "./";
     std::string ExactArtifactPath;
     bool SaveArtifacts = true;
@@ -365,8 +363,6 @@
   // Must be called whenever the corpus or unit weights are changed.
   void UpdateCorpusDistribution();
 
-  void SyncCorpus();
-
   size_t RecordBlockCoverage();
   size_t RecordCallerCalleeCoverage();
   void PrepareCoverageBeforeRun();
@@ -412,7 +408,6 @@
   MutationDispatcher &MD;
   FuzzingOptions Options;
   system_clock::time_point ProcessStartTime = system_clock::now();
-  system_clock::time_point LastExternalSync = system_clock::now();
   system_clock::time_point UnitStartTime;
   long TimeOfLongestUnitInSeconds = 0;
   long EpochOfLastReadOfOutputCorpus = 0;
diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index 3492f7f..4f3b5a7 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -561,7 +561,6 @@
   if (Options.DoCrossOver)
     MD.SetCorpus(&Corpus);
   while (true) {
-    SyncCorpus();
     auto Now = system_clock::now();
     if (duration_cast<seconds>(Now - LastCorpusReload).count()) {
       RereadOutputCorpus(Options.MaxLen);
@@ -581,17 +580,6 @@
   MD.PrintRecommendedDictionary();
 }
 
-void Fuzzer::SyncCorpus() {
-  if (Options.SyncCommand.empty() || Options.OutputCorpus.empty())
-    return;
-  auto Now = system_clock::now();
-  if (duration_cast<seconds>(Now - LastExternalSync).count() <
-      Options.SyncTimeout)
-    return;
-  LastExternalSync = Now;
-  ExecuteCommand(Options.SyncCommand + " " + Options.OutputCorpus);
-}
-
 void Fuzzer::UpdateCorpusDistribution() {
   size_t N = Corpus.size();
   std::vector<double> Intervals(N + 1);
diff --git a/llvm/lib/Fuzzer/pull_and_push_fuzz_corpus.sh b/llvm/lib/Fuzzer/pull_and_push_fuzz_corpus.sh
deleted file mode 100755
index 05c322c..0000000
--- a/llvm/lib/Fuzzer/pull_and_push_fuzz_corpus.sh
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/bash
-# A simple script to synchronise a fuzz test corpus
-# with an external git repository.
-# Usage:
-#   pull_and_push_fuzz_corpus.sh DIR
-# It assumes that DIR is inside a git repo and push
-# can be done w/o typing a password.
-cd $1
-git add *
-git commit -m "fuzz test corpus"
-git pull --rebase --no-edit
-for((attempt=0; attempt<5; attempt++)); do
-  echo GIT PUSH $1 ATTEMPT $attempt
-  if $(git push); then break; fi
-  git pull --rebase --no-edit
-done
-
diff --git a/llvm/lib/Fuzzer/test/fuzzer-timeout.test b/llvm/lib/Fuzzer/test/fuzzer-timeout.test
index 1c08871..2defef6 100644
--- a/llvm/lib/Fuzzer/test/fuzzer-timeout.test
+++ b/llvm/lib/Fuzzer/test/fuzzer-timeout.test
@@ -7,7 +7,7 @@
 TimeoutTest: #2
 TimeoutTest: SUMMARY: libFuzzer: timeout
 
-RUN: not LLVMFuzzer-TimeoutTest -timeout=1 -test_single_input=%S/hi.txt 2>&1 | FileCheck %s --check-prefix=SingleInputTimeoutTest
+RUN: not LLVMFuzzer-TimeoutTest -timeout=1 %S/hi.txt 2>&1 | FileCheck %s --check-prefix=SingleInputTimeoutTest
 SingleInputTimeoutTest: ALARM: working on the last Unit for
 SingleInputTimeoutTest-NOT: Test unit written to ./timeout-
 
diff --git a/llvm/lib/Fuzzer/test/fuzzer.test b/llvm/lib/Fuzzer/test/fuzzer.test
index 0822995..95d0eca 100644
--- a/llvm/lib/Fuzzer/test/fuzzer.test
+++ b/llvm/lib/Fuzzer/test/fuzzer.test
@@ -2,7 +2,7 @@
 Done1000000: Done 1000000 runs in
 
 RUN: LLVMFuzzer-SimpleTest 2>&1 | FileCheck %s
-RUN: not LLVMFuzzer-NullDerefTest -test_single_input=%S/hi.txt 2>&1 | FileCheck %s --check-prefix=SingleInput
+RUN: not LLVMFuzzer-NullDerefTest %S/hi.txt 2>&1 | FileCheck %s --check-prefix=SingleInput
 SingleInput-NOT: Test unit written to ./crash-
 
 RUN: LLVMFuzzer-SimpleCmpTest -max_total_time=1 2>&1 | FileCheck %s --check-prefix=MaxTotalTime