refactor: TT-404 revert changes _db.py

Author: Jobzi

V2/time_tracker/_infrastructure/_db.py

@@ -2,8 +2,6 @@
 
 from . import _config
 
-_TEST_DIALECT = "sqlite"
-
 
 class DB():
     config = _config.load_config()
@@ -19,6 +17,4 @@ def get_session(self):
         self.metadata.create_all(self.engine)
         if self.connection is None:
             self.connection = self.engine.connect()
-            if self.engine.dialect.name == _TEST_DIALECT:
-                self.connection.execute("pragma foreign_keys=ON")
         return self.connection