Set default value of github_access_token to the automatically generated GitHub token

Author: rickynils

action.yml

@@ -26,11 +26,9 @@ inputs:
       you define are supported by the Nix version you're using.
 
   github_access_token:
-    required: false
+    default: ${{ github.token }}
     description: |
-      Configure Nix to use the specified token when fetching from GitHub. If
-      this setting is not specified, nix-quick-install-action will use the
-      content of the GITHUB_TOKEN environment variable instead (if set).
+      Configure Nix to use the specified token when fetching from GitHub.
 
   nix_on_tmpfs:
     required: true

nix-quick-install.sh

@@ -71,9 +71,6 @@ fi
 if [[ -n "${GITHUB_ACCESS_TOKEN:-}" ]]; then
   echo >>"$NIX_CONF_FILE" \
     "access-tokens = github.com=$GITHUB_ACCESS_TOKEN"
-elif [[ -n "${GITHUB_TOKEN:-}" ]]; then
-  echo >>"$NIX_CONF_FILE" \
-    "access-tokens = github.com=$GITHUB_TOKEN"
 fi
 
 # Populate the nix db