fix(docs): Remove unnecessary dependency to @ngqp/core from demo

Author: Airblader

package.json

@@ -12,7 +12,6 @@
         "demo:serve": "ng serve ngqp-demo",
         "schematics:build": "scripts/build-schematics.sh",
         "release": "scripts/release.sh",
-
         "//publish:demo": "yarn build:core && ng build ngqp-demo --prod --base-href=\"https://Airblader.github.io/ngqp/\" && npx ngh --dir=dist/ngqp-demo"
     },
     "private": true,
@@ -30,7 +29,6 @@
         "@fortawesome/free-brands-svg-icons": "^5.6.1",
         "@fortawesome/free-solid-svg-icons": "^5.6.1",
         "@ng-bootstrap/ng-bootstrap": "^4.0.0",
-        "@ngqp/core": "./projects/ngqp/core",
         "add": "^2.0.6",
         "bootstrap": "^4.1.3",
         "core-js": "^2.5.4",

yarn.lock

@@ -333,9 +333,6 @@
   dependencies:
     tslib "^1.9.0"
 
-"@ngqp/core@./projects/ngqp/core":
-  version "0.0.3"
-
 "@ngtools/json-schema@^1.1.0":
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/@ngtools/json-schema/-/json-schema-1.1.0.tgz#c3a0c544d62392acc2813a42c8a0dc6f58f86922"