small changes to explanation

content/cli/reference.mdx

@@ -92,13 +92,7 @@ This command accepts all the command line flags as Docker's `docker buildx bake`
 
 ### `depot build`
 
-Runs a Docker build using Depot's remote builder infrastructure. This command accepts all the command line flags as Docker's `docker buildx build` command, you can run `depot build --help` for the full list.
-
-The `build` command needs to know which [project](/docs/core-concepts#projects) id to route the build to. For passing the project id you have three options available to you:
-
-1. Run [`depot init`](/docs/cli/reference#depot-init) at the root of your repository and commit the resulting `depot.json` file
-2. Use the `--project` flag in your `depot build` command
-3. Set the `DEPOT_PROJECT_ID` environment variable which will be automatically detected
+Runs a Docker build using Depot's remote builder infrastructure.
 
 By default, `depot build` will leave the built image in the remote builder cache. If you would like to download the image to your local Docker daemon (for instance, to `docker run` the result), you can use the `--load` flag.
 
@@ -128,6 +122,8 @@ depot build -t repo/image:tag . --push
 
 #### Flags for `build`
 
+This command accepts all the command line flags as Docker's `docker buildx build` command.
+
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