Remove file when error while saving the data in DB

TODO.md

@@ -1,9 +1,5 @@
 ## Tasks
 
-# Testing
-
-- [ ] Tests for the server module
-
 # Development plans
 - [ ] make print_log to write a file log
 - [ ] Remove file when error while saving the data in DB
@@ -11,26 +7,10 @@
 - [ ] Unified list of exit codes
 
 ## Features
-
-- [x] Database integration
-- [x] Paging in the file list
-- [x] Get files in FS by their hash
-- [x] Registration
-- [x] Encrypt passwords in DB
-- [x] Registration: Error when username or email is already used
+- [ ] Sorting in the file list
 - [ ] Check correctness of email
 - [ ] Message to admin
-- [x] Advanced folder structure in the storage
 - [ ] File encryption
 - [ ] Connection encryption
 - [ ] Advanced rights for files
-- [ ] Multithreading
-
-## Done
-
-- [x] Switch to SQLite
-- [x] Close the DB correctly in any quit case (also by SIGTERM)
-- [x] Get rid of unsigned integers
-- [x] Check registration
-- [x] Auto create a database when one is missing
-- [x] Show date in server log
+- [ ] Multithreading