Remove assignee_id param in new issue path

This does not work so we just remove this

app/finders/issuable_finder.rb

@@ -50,7 +50,7 @@ class IssuableFinder
   attr_reader :original_params
   attr_writer :parent
 
-  delegate(*%i[assignee milestones], to: :params)
+  delegate(*%i[milestones], to: :params)
 
   class << self
     def scalar_params

app/helpers/issues_helper.rb

@@ -200,7 +200,7 @@ module IssuesHelper
       jira_integration_path: help_page_url('integration/jira/', anchor: 'view-jira-issues'),
       markdown_help_path: help_page_path('user/markdown'),
       max_attachment_size: number_to_human_size(Gitlab::CurrentSettings.max_attachment_size.megabytes),
-      new_issue_path: new_project_issue_path(project, issue: { assignee_id: finder.assignee.try(:id), milestone_id: finder.milestones.first.try(:id) }),
+      new_issue_path: new_project_issue_path(project, issue: { milestone_id: finder.milestones.first.try(:id) }),
       project_import_jira_path: project_import_jira_path(project),
       project_labels_path: project_labels_path(project, include_ancestor_groups: true, format: :json),
       project_milestones_path: project_milestones_path(project, format: :json),

app/views/projects/issues/_nav_btns.html.haml

@@ -15,8 +15,7 @@
     = button_tag _("Edit issues"), class: "gl-button btn btn-default gl-mr-3 js-bulk-update-toggle"
   - if show_new_issue_link?(@project)
     = link_to _("New issue"), new_project_issue_path(@project,
-                                                  issue: { assignee_id: finder.assignee.try(:id),
-                                                           milestone_id: finder.milestones.first.try(:id) }),
+                                                  issue: { milestone_id: finder.milestones.first.try(:id) }),
                                                   class: "gl-button btn btn-confirm",
                                                   id: "new_issue_link"
 

spec/helpers/issues_helper_spec.rb

@@ -312,7 +312,7 @@ RSpec.describe IssuesHelper do
         jira_integration_path: help_page_url('integration/jira/', anchor: 'view-jira-issues'),
         markdown_help_path: help_page_path('user/markdown'),
         max_attachment_size: number_to_human_size(Gitlab::CurrentSettings.max_attachment_size.megabytes),
-        new_issue_path: new_project_issue_path(project, issue: { assignee_id: finder.assignee.id, milestone_id: finder.milestones.first.id }),
+        new_issue_path: new_project_issue_path(project, issue: { milestone_id: finder.milestones.first.id }),
         project_import_jira_path: project_import_jira_path(project),
         project_labels_path: project_labels_path(project, include_ancestor_groups: true, format: :json),
         project_milestones_path: project_milestones_path(project, format: :json),