chore: fix branch name in ci script (#234)

* chore: fix branch name in ci script

* chore: remove circleci script

Author: Woosang Son

.circleci/config.yml

@@ -1,22 +1,22 @@
 name: Tests / Code Coverage
 #  Tests / Code Coverage workflow runs unit tests and uploads a code coverage report
-#  This workflow is run on pushes to v2/develop & every Pull Requests where a .go, .mod, .sum have been changed
+#  This workflow is run on pushes to develop & every Pull Requests where a .go, .mod, .sum have been changed
 env:
   GOPRIVATE: "github.com/line/*"
 
 on:
   pull_request:
   push:
     branches:
-      - v2/develop
+      - develop
 jobs:
   cleanup-runs:
     runs-on: ubuntu-latest
     steps:
       - uses: rokroskar/workflow-run-cleanup-action@master
         env:
           GITHUB_TOKEN: "${{ secrets.TOKEN }}"
-    if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/v2/develop'"
+    if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/develop'"
 
   install-tparse:
     runs-on: ubuntu-latest