remove ttrss patch (plugin has not been updated in years)

Dockerfile

@@ -18,11 +18,9 @@ RUN mv data data-orig && ln -s /app/data data
 # official extensions
 ADD change-ttrss-file-path.patch /app/code/change-ttrss-file-path.patch
 RUN wget https://github.com/FreshRSS/Extensions/archive/${EXTENSIONS_VERSION}.tar.gz -O - \
-    | tar -xz --strip-components=1 -C /app/code/extensions \
+    | tar -xz --strip-components=1 -C /app/code/extensions
-    && patch -p0 -d /app/code < /app/code/change-ttrss-file-path.patch \
     && mv /app/code/extensions /app/code/extensions-orig \
-    && ln -s /app/data/extensions /app/code/extensions \
+    && ln -s /app/data/extensions /app/code/extensions
-    && ln -s /app/data/extensions/ttrss.php /app/code/p/api/ttrss.php
 
 # configure apache
 RUN rm /etc/apache2/sites-enabled/*

change-ttrss-file-path.patch

@@ -1,21 +0,0 @@
-diff -ru extensions-orig/xExtension-TTRSS_API/extension.php extensions/xExtension-TTRSS_API/extension.php
---- extensions-orig/xExtension-TTRSS_API/extension.php	2016-12-15 10:24:17.000000000 +0000
-+++ extensions/xExtension-TTRSS_API/extension.php	2017-02-18 13:06:59.640761922 +0000
-@@ -9,7 +9,7 @@
- 	public function install() {
- 		$filename = 'ttrss.php';
- 		$file_source = join_path($this->getPath(), $filename);
--		$path_destination = join_path(PUBLIC_PATH, 'api');
-+		$path_destination = '/app/data/extensions';
- 		$file_destination = join_path($path_destination, $filename);
- 
- 		if (!is_writable($path_destination)) {
-@@ -35,7 +35,7 @@
- 
- 	public function uninstall() {
- 		$filename = 'ttrss.php';
--		$file_destination = join_path(PUBLIC_PATH, 'api', $filename);
-+		$file_destination = join_path('/app/data/extensions', $filename);
- 
- 		if (file_exists($file_destination) && !unlink($file_destination)) {
- 			return 'API file cannot be removed';