diff --git a/src/Composer/DependencyResolver/Rule.php b/src/Composer/DependencyResolver/Rule.php
index 083e65935..5469470c3 100644
--- a/src/Composer/DependencyResolver/Rule.php
+++ b/src/Composer/DependencyResolver/Rule.php
@@ -331,16 +331,6 @@ abstract class Rule
         return Problem::getPackageList($packages, $isVerbose);
     }
 
-    private function getReplacedNames(PackageInterface $package)
-    {
-        $names = array();
-        foreach ($package->getReplaces() as $link) {
-            $names[] = $link->getTarget();
-        }
-
-        return $names;
-    }
-
     private function deduplicateDefaultBranchAlias(PackageInterface $package)
     {
         if ($package instanceof AliasPackage && $package->getPrettyVersion() === VersionParser::DEFAULT_BRANCH_ALIAS) {
diff --git a/src/Composer/DependencyResolver/Solver.php b/src/Composer/DependencyResolver/Solver.php
index fcdaf210f..a383f64cf 100644
--- a/src/Composer/DependencyResolver/Solver.php
+++ b/src/Composer/DependencyResolver/Solver.php
@@ -591,17 +591,6 @@ class Solver
         return 0;
     }
 
-    private function resetSolver()
-    {
-        $this->decisions->reset();
-
-        $this->propagateIndex = 0;
-        $this->branches = array();
-
-        $this->enableDisableLearnedRules();
-        $this->makeAssertionRuleDecisions();
-    }
-
     /**
      * enable/disable learnt rules
      *
diff --git a/src/Composer/EventDispatcher/EventDispatcher.php b/src/Composer/EventDispatcher/EventDispatcher.php
index 949aaf157..514ecb990 100644
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@@ -315,23 +315,6 @@ class EventDispatcher
         return $className::$methodName($event);
     }
 
-    private function serializeCallback($cb)
-    {
-        if (is_array($cb) && count($cb) === 2) {
-            if (is_object($cb[0])) {
-                $cb[0] = get_class($cb[0]);
-            }
-            if (is_string($cb[0]) && is_string($cb[1])) {
-                $cb = implode('::', $cb);
-            }
-        }
-        if (is_string($cb)) {
-            return $cb;
-        }
-
-        return var_export($cb, true);
-    }
-
     /**
      * Add a listener for a particular event
      *
diff --git a/src/Composer/Util/Http/CurlDownloader.php b/src/Composer/Util/Http/CurlDownloader.php
index 573e5b3b0..92b3bd0ff 100644
--- a/src/Composer/Util/Http/CurlDownloader.php
+++ b/src/Composer/Util/Http/CurlDownloader.php
@@ -479,20 +479,6 @@ class CurlDownloader
         return new TransportException('The "'.$job['url'].'" file could not be downloaded ('.$errorMessage.')', $response->getStatusCode());
     }
 
-    private function onProgress($curlHandle, callable $notify, array $progress, array $previousProgress)
-    {
-        // TODO add support for progress
-        if (300 <= $progress['http_code'] && $progress['http_code'] < 400) {
-            return;
-        }
-        if ($previousProgress['download_content_length'] < $progress['download_content_length']) {
-            $notify(STREAM_NOTIFY_FILE_SIZE_IS, STREAM_NOTIFY_SEVERITY_INFO, '', 0, 0, (int) $progress['download_content_length'], false);
-        }
-        if ($previousProgress['size_download'] < $progress['size_download']) {
-            $notify(STREAM_NOTIFY_PROGRESS, STREAM_NOTIFY_SEVERITY_INFO, '', 0, (int) $progress['size_download'], (int) $progress['download_content_length'], false);
-        }
-    }
-
     private function checkCurlResult($code)
     {
         if ($code != CURLM_OK && $code != CURLM_CALL_MULTI_PERFORM) {