chore: remove unnecessary .gitkeep file creation (#84)

Rmoves the unnecessary creation of a `.gitkeep` file

Author: iyad-f

sqlspec/migrations/base.py

@@ -509,8 +509,6 @@ def init_directory(self, directory: str, package: bool = True) -> None:
         readme = migrations_dir / "README.md"
         readme.write_text(self._get_init_readme_content())
 
-        (migrations_dir / ".gitkeep").touch()
-
         console.print(f"[green]Initialized migrations in {directory}[/]")
 
     @abstractmethod