When working with a git repository, it's common to have certain files or directories that you don't want to include in version control. This could be compiled binary files, such as those found in the 'bin' and 'obj' directories created by a build process. If you need to remove bin and obj files from version control in Git, you can use a .gitignore file to specify the files and directories to be ignored. Here's how to do it:

1. Create a .gitignore file: If you don't already have a .gitignore file in your repository, you'll need to create one. This file should be placed in the root of your repository and should list the files and directories to be ignored.

2. Add bin and obj to .gitignore: Open the .gitignore file in a text editor and add the following lines to specify that all files and directories with the names 'bin' and 'obj' should be ignored:

```

bin/

obj/

```

3. Commit the .gitignore file: Once you've added the necessary lines to the .gitignore file, you should save the file and commit it to your repository. This will ensure that the ignore rules are applied to the repository and that the bin and obj files are no longer tracked by Git.

By following these simple steps, you can easily remove bin and obj files from version control in Git, keeping your repository clean and focused on the source code and other essential assets.