Remove v-tooltip since we use the one from nextcloud-vue

Signed-off-by: Julius Härtl <jus@bitgrid.net>

package.json

@@ -31,7 +31,6 @@
 		"prosemirror-view": "^1.9.13",
 		"tiptap": "^1.24.0",
 		"tiptap-extensions": "^1.26.0",
-		"v-tooltip": "^2.0.2",
 		"vue": "^2.6.10",
 		"vue-click-outside": "^1.0.7"
 	},