Revert "crowdin_sync: Add stable branch sync support"

* No longer needed

This reverts commit 432919aa5aed9fe7de1bf9b4d655a9a837ad71f5.

Change-Id: Ic697d259a0103f29f5183d7f2763879f45d03ccf
diff --git a/README.mkdn b/README.mkdn
index ebb6be1..766cef2 100644
--- a/README.mkdn
+++ b/README.mkdn
@@ -24,21 +24,17 @@
 Executing
 ---------
 Export the following environment variables to set the API keys and the base path.
-Base path should contain all LineageOS trees in subfolders, named after LineageOS branches.
-Syncing stable trees requires an additional environment variable plus a 'stable'
-subfolder under the base path, due to crowdin API limitations:
+Base path should contain all LineageOS trees in subfolders, named after LineageOS branches:
 
     export CM_CROWDIN_API_KEY=your_api_key
     export CM_AOSP_CROWDIN_API_KEY=your_aosp_api_key
     export CM_CROWDIN_BASE_PATH=your_base_path
-    export CM_CROWDIN_STABLE_BASE_PATH=your_stable_base_path
 
 Example:
 
     export CM_CROWDIN_API_KEY=1234567890
     export CM_AOSP_CROWDIN_API_KEY=0987654321
     export CM_CROWDIN_BASE_PATH=/mnt/android/lineageos
-    export CM_CROWDIN_STABLE_BASE_PATH=/mnt/android/lineageos/stable
 
 Execute: