OPS: fix appcenter android build

appcenter-post-build.sh

@@ -22,6 +22,7 @@ if [ -f $FILENAME ]; then
     FILENAME_UNIQ="$APPCENTER_OUTPUT_DIRECTORY/$HASH.apk"
     cp "$FILENAME" "$FILENAME_UNIQ"
     curl "http://filestorage.bluewallet.io:1488/upload.php" -F "fileToUpload=@$FILENAME_UNIQ"
+    rm "$FILENAME_UNIQ"
     DLOAD_APK="http://filestorage.bluewallet.io:1488/$HASH.apk"
 
     curl -X POST --data "{\"body\":\"♫ This was a triumph. I'm making a note here: HUGE SUCCESS ♫\n\n [android in browser] $APPURL\n\n[download apk]($DLOAD_APK) \"}"  -u "$GITHUB" "https://api.github.com/repos/BlueWallet/BlueWallet/issues/$PR/comments"