Remove redundant call to ynh_webpath_available (#53)

ynh_webpath_register will take care of check & fail nicely if needed.

scripts/install

@@ -55,8 +55,6 @@ test ! -e "$final_path" || ynh_die "This path already contains a folder"
 # Normalize the url path syntax
 path_url=$(ynh_normalize_url_path $path_url)
 
-# Check web path availability
-ynh_webpath_available $domain $path_url
 # Register (book) web path
 ynh_webpath_register $app $domain $path_url