chore: rm gitea/app.in

SUMMARY
    This file was used to spawn a Gitea instance from binary for
    integration testing. That strategy was abandoned long ago but this
    file wasn't cleaned up.

fixes: https://gitea.hostea.org/Hostea/dashboard/issues/34

gitea/app.ini

@@ -1,75 +0,0 @@
-APP_NAME = Gitea: Git with a cup of tea
-RUN_USER = atm
-RUN_MODE = prod
-
-[database]
-DB_TYPE  = sqlite3
-HOST     = 127.0.0.1:3306
-NAME     = gitea
-USER     = gitea
-PASSWD   =
-SCHEMA   =
-SSL_MODE = disable
-CHARSET  = utf8
-PATH     = ./tmp/gitea/db/gitea.db
-LOG_SQL  = false
-
-[repository]
-ROOT = ./tmp/gitea/repos/
-
-[server]
-SSH_DOMAIN       = localhost
-DOMAIN           = localhost
-HTTP_PORT        = 3000
-ROOT_URL         = http://localhost:3000/
-DISABLE_SSH      = false
-SSH_PORT         = 2222
-LFS_START_SERVER = true
-LFS_JWT_SECRET   = MilbUZw4BbeFsnOWBDGzYrgBINrkJIcoOPivE9IPNAQ
-OFFLINE_MODE     = false
-
-[lfs]
-PATH = ./tmp/gitea/lfs/
-
-[mailer]
-ENABLED = false
-
-[service]
-REGISTER_EMAIL_CONFIRM            = false
-ENABLE_NOTIFY_MAIL                = false
-DISABLE_REGISTRATION              = false
-ALLOW_ONLY_EXTERNAL_REGISTRATION  = false
-ENABLE_CAPTCHA                    = false
-REQUIRE_SIGNIN_VIEW               = false
-DEFAULT_KEEP_EMAIL_PRIVATE        = false
-DEFAULT_ALLOW_CREATE_ORGANIZATION = true
-DEFAULT_ENABLE_TIMETRACKING       = true
-NO_REPLY_ADDRESS                  = noreply.localhost
-
-[picture]
-DISABLE_GRAVATAR        = false
-ENABLE_FEDERATED_AVATAR = true
-
-[openid]
-ENABLE_OPENID_SIGNIN = true
-ENABLE_OPENID_SIGNUP = true
-
-[session]
-PROVIDER = file
-
-[log]
-MODE      = console
-LEVEL     = debug
-ROOT_PATH = ./tmp/gitea/log
-ROUTER    = console
-
-[repository.pull-request]
-DEFAULT_MERGE_STYLE = merge
-
-[repository.signing]
-DEFAULT_TRUST_MODEL = committer
-
-[security]
-INSTALL_LOCK       = true
-INTERNAL_TOKEN     = eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYmYiOjE2NTQ2MDY2ODV9.WbIw4n8M_MXy594pqgmEMD3NUtTpL8hcUC_uhoSc5ec
-PASSWORD_HASH_ALGO = pbkdf2