diff --git a/src/conduit/ConduitFuture.php b/src/conduit/ConduitFuture.php
--- a/src/conduit/ConduitFuture.php
+++ b/src/conduit/ConduitFuture.php
@@ -3,7 +3,6 @@
 final class ConduitFuture extends FutureProxy {
 
   private $client;
-  private $engine;
   private $conduitMethod;
 
   public function setClient(ConduitClient $client, $method) {
diff --git a/src/config/ArcanistConfigurationEngine.php b/src/config/ArcanistConfigurationEngine.php
--- a/src/config/ArcanistConfigurationEngine.php
+++ b/src/config/ArcanistConfigurationEngine.php
@@ -5,7 +5,6 @@
 
   private $workingCopy;
   private $arguments;
-  private $toolset;
 
   public function setWorkingCopy(ArcanistWorkingCopy $working_copy) {
     $this->workingCopy = $working_copy;
diff --git a/src/console/grid/ArcanistGridCell.php b/src/console/grid/ArcanistGridCell.php
--- a/src/console/grid/ArcanistGridCell.php
+++ b/src/console/grid/ArcanistGridCell.php
@@ -5,8 +5,6 @@
 
   private $key;
   private $content;
-  private $contentWidth;
-  private $contentHeight;
 
   public function setKey($key) {
     $this->key = $key;
diff --git a/src/future/exec/ExecFuture.php b/src/future/exec/ExecFuture.php
--- a/src/future/exec/ExecFuture.php
+++ b/src/future/exec/ExecFuture.php
@@ -38,7 +38,6 @@
   private $stdoutSizeLimit = PHP_INT_MAX;
   private $stderrSizeLimit = PHP_INT_MAX;
 
-  private $profilerCallID;
   private $killedByTimeout;
 
   private $windowsStdoutTempFile = null;
diff --git a/src/future/http/HTTPFuture.php b/src/future/http/HTTPFuture.php
--- a/src/future/http/HTTPFuture.php
+++ b/src/future/http/HTTPFuture.php
@@ -38,8 +38,6 @@
   private $stateReady         = false;
   private $stateStartTime;
 
-  private $profilerCallID;
-
   public function setURI($uri) {
     $parts = parse_url($uri);
     if (!$parts) {
diff --git a/src/future/http/HTTPSFuture.php b/src/future/http/HTTPSFuture.php
--- a/src/future/http/HTTPSFuture.php
+++ b/src/future/http/HTTPSFuture.php
@@ -11,7 +11,6 @@
   private static $globalCABundle;
 
   private $handle;
-  private $profilerCallID;
   private $cabundle;
   private $followLocation = true;
   private $responseBuffer = '';
diff --git a/src/parser/argument/PhutilArgumentParser.php b/src/parser/argument/PhutilArgumentParser.php
--- a/src/parser/argument/PhutilArgumentParser.php
+++ b/src/parser/argument/PhutilArgumentParser.php
@@ -72,7 +72,6 @@
   private $argv;
   private $specs = array();
   private $results = array();
-  private $parsed;
 
   private $tagline;
   private $synopsis;
diff --git a/src/ref/commit/ArcanistCommitRef.php b/src/ref/commit/ArcanistCommitRef.php
--- a/src/ref/commit/ArcanistCommitRef.php
+++ b/src/ref/commit/ArcanistCommitRef.php
@@ -7,7 +7,6 @@
   private $treeHash;
   private $commitEpoch;
   private $authorEpoch;
-  private $upstream;
 
   const HARDPOINT_MESSAGE = 'message';
   const HARDPOINT_UPSTREAM = 'upstream';
diff --git a/src/repository/marker/ArcanistRepositoryMarkerQuery.php b/src/repository/marker/ArcanistRepositoryMarkerQuery.php
--- a/src/repository/marker/ArcanistRepositoryMarkerQuery.php
+++ b/src/repository/marker/ArcanistRepositoryMarkerQuery.php
@@ -6,8 +6,6 @@
   private $isActive;
   private $markerTypes;
   private $names;
-  private $commitHashes;
-  private $ancestorCommitHashes;
   private $remotes;
   private $isRemoteCache = false;
 
diff --git a/src/utils/PhutilArrayCheck.php b/src/utils/PhutilArrayCheck.php
--- a/src/utils/PhutilArrayCheck.php
+++ b/src/utils/PhutilArrayCheck.php
@@ -7,9 +7,6 @@
   private $uniqueMethod;
   private $context;
 
-  private $object;
-  private $method;
-
   public function setInstancesOf($instances_of) {
     $this->instancesOf = $instances_of;
     return $this;
diff --git a/src/workflow/ArcanistMarkersWorkflow.php b/src/workflow/ArcanistMarkersWorkflow.php
--- a/src/workflow/ArcanistMarkersWorkflow.php
+++ b/src/workflow/ArcanistMarkersWorkflow.php
@@ -3,8 +3,6 @@
 abstract class ArcanistMarkersWorkflow
   extends ArcanistArcWorkflow {
 
-  private $nodes;
-
   abstract protected function getWorkflowMarkerType();
 
   public function runWorkflow() {
diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -57,7 +57,6 @@
   private $stashed;
   private $shouldAmend;
 
-  private $projectInfo;
   private $repositoryInfo;
   private $repositoryReasons;
   private $repositoryRef;