diff --git a/apps/files_external/lib/amazons3.php b/apps/files_external/lib/amazons3.php
index 00915140bab8f161f9779244057238059700828c..4b867c005a7992a4e21348edd10688c417f091c3 100644
--- a/apps/files_external/lib/amazons3.php
+++ b/apps/files_external/lib/amazons3.php
@@ -418,27 +418,6 @@ class AmazonS3 extends \OC\Files\Storage\Common {
 		return false;
 	}
 
-	public function getMimeType($path) {
-		$path = $this->normalizePath($path);
-
-		if ($this->is_dir($path)) {
-			return 'httpd/unix-directory';
-		} else if ($this->file_exists($path)) {
-			try {
-				$result = $this->getConnection()->headObject(array(
-					'Bucket' => $this->bucket,
-					'Key' => $path
-				));
-			} catch (S3Exception $e) {
-				\OCP\Util::logException('files_external', $e);
-				return false;
-			}
-
-			return $result['ContentType'];
-		}
-		return false;
-	}
-
 	public function touch($path, $mtime = null) {
 		$path = $this->normalizePath($path);
 
diff --git a/apps/files_external/lib/dropbox.php b/apps/files_external/lib/dropbox.php
index 3b353b7777a02e0fe8f6b9e36186f6466a77fba0..df8a0255134356e489698cf4452126eacfbd5db5 100644
--- a/apps/files_external/lib/dropbox.php
+++ b/apps/files_external/lib/dropbox.php
@@ -299,18 +299,6 @@ class Dropbox extends \OC\Files\Storage\Common {
 		}
 	}
 
-	public function getMimeType($path) {
-		if ($this->filetype($path) == 'dir') {
-			return 'httpd/unix-directory';
-		} else {
-			$metaData = $this->getDropBoxMetaData($path);
-			if ($metaData) {
-				return $metaData['mime_type'];
-			}
-		}
-		return false;
-	}
-
 	public function free_space($path) {
 		try {
 			$info = $this->dropbox->getAccountInfo();
diff --git a/apps/files_external/lib/swift.php b/apps/files_external/lib/swift.php
index b9454b8d6718fdf2d496dfb5c8456111e4803297..beb47ce0bced6a4b313c9f8a4e52234621d44326 100644
--- a/apps/files_external/lib/swift.php
+++ b/apps/files_external/lib/swift.php
@@ -361,18 +361,6 @@ class Swift extends \OC\Files\Storage\Common {
 		}
 	}
 
-	public function getMimeType($path) {
-		$path = $this->normalizePath($path);
-
-		if ($this->is_dir($path)) {
-			return 'httpd/unix-directory';
-		} else if ($this->file_exists($path)) {
-			$object = $this->getContainer()->getPartialObject($path);
-			return $object->getContentType();
-		}
-		return false;
-	}
-
 	public function touch($path, $mtime = null) {
 		$path = $this->normalizePath($path);
 		if (is_null($mtime)) {