chore: remove issue to project action (#24029)

.github/issue_labeler.yml

@@ -1,2 +0,0 @@
-needs-triage: # if no label is set then set triage
-  - ''

.github/workflows/issues.yml

@@ -1,18 +0,0 @@
-name: Add Sprint issues to Cosmos SDK Project 
-
-on:
-  issues:
-    types:
-      - opened
-      - labeled
-
-jobs:
-  add-to-project:
-    name: Add issue to project
-    runs-on: depot-ubuntu-22.04-4
-    steps:
-      - uses: actions/add-to-project@v1.0.2
-        with:
-          project-url: https://github.com/orgs/cosmos/projects/26
-# add all issues opened to the issue board for triage and assignment
-          github-token: ${{ secrets.PERSONAL_TOKEN }}