Ignore package.json in docs folder on docs-build branch

.gitignore

@@ -19,3 +19,4 @@ node
 node_modules
 build
 package-lock.json
+docs/package.json

docs/package.json

@@ -1,12 +0,0 @@
-{
-  "dependencies": {
-    "@antora/atlas-extension": "^1.0.0-alpha.1",
-    "@antora/cli": "^3.2.0-alpha.2",
-    "@antora/collector-extension": "^1.0.0-alpha.3",
-    "@antora/site-generator-default": "^3.2.0-alpha.2",
-    "@asciidoctor/tabs": "^1.0.0-beta.3",
-    "@springio/antora-extensions": "^1.6.0",
-    "@springio/asciidoctor-extensions": "^1.0.0-alpha.9",
-    "asciidoctor-kroki": "^0.17.0"
-  }
-}