Remove unused APP_HOST/APP_PORT settings

.env.example

@@ -1,7 +1,3 @@
-# App server
-APP_HOST=0.0.0.0
-APP_PORT=8000
-
 # Name used in the HTML page title/heading and the curl examples
 # (e.g. "ifconfig.me" when deployed under that domain).
 SITE_NAME=pyfconfig

README.md

@@ -69,10 +69,11 @@ Environment variables (see `.env.example`):
 
 | Variable | Default | Description |
 |---|---|---|
-| `APP_HOST` | `0.0.0.0` | Bind host (informational; granian is configured via `GRANIAN_*`) |
-| `APP_PORT` | `8000` | Bind port (informational) |
 | `SITE_NAME` | `pyfconfig` | Public name used in the HTML page title and the curl examples (set to your domain, e.g. `ifconfig.example.com`) |
 
+The bind address is configured through Granian itself (`GRANIAN_HOST` /
+`GRANIAN_PORT` env vars or `--host` / `--port` CLI flags).
+
 ## Tests
 
 ```bash

src/pyfconfig/config.py

@@ -21,15 +21,11 @@ def _env(name: str, default: Optional[str] = None) -> str:
 
 @dataclass(frozen=True)
 class Settings:
-    app_host: str
-    app_port: int
     site_name: str
 
     @staticmethod
     def from_env() -> "Settings":
         return Settings(
-            app_host=_env("APP_HOST", "0.0.0.0"),
-            app_port=int(_env("APP_PORT", "8000")),
             # Public name of the deployment, used in the HTML page title
             # and in the command-line examples (e.g. "ifconfig.me").
             site_name=_env("SITE_NAME", "pyfconfig"),