completely remove drive caching layer from gateway days (#18217)

This has already been deprecated for close to a year now.

internal/config/cache/help.go

@@ -1,89 +0,0 @@
-// Copyright (c) 2015-2021 MinIO, Inc.
-//
-// This file is part of MinIO Object Storage stack
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package cache
-
-import "github.com/minio/minio/internal/config"
-
-// Help template for caching feature.
-var (
-	defaultHelpPostfix = func(key string) string {
-		return config.DefaultHelpPostfix(DefaultKVS, key)
-	}
-
-	Help = config.HelpKVS{
-		config.HelpKV{
-			Key:         Drives,
-			Description: `comma separated mountpoints e.g. "/optane1,/optane2"` + defaultHelpPostfix(Drives),
-			Type:        "csv",
-		},
-		config.HelpKV{
-			Key:         Expiry,
-			Description: `cache expiry duration in days` + defaultHelpPostfix(Expiry),
-			Optional:    true,
-			Type:        "number",
-		},
-		config.HelpKV{
-			Key:         Quota,
-			Description: `limit cache drive usage in percentage` + defaultHelpPostfix(Quota),
-			Optional:    true,
-			Type:        "number",
-		},
-		config.HelpKV{
-			Key:         Exclude,
-			Description: `exclude cache for following patterns e.g. "bucket/*.tmp,*.exe"` + defaultHelpPostfix(Exclude),
-			Optional:    true,
-			Type:        "csv",
-		},
-		config.HelpKV{
-			Key:         After,
-			Description: `minimum number of access before caching an object` + defaultHelpPostfix(After),
-			Optional:    true,
-			Type:        "number",
-		},
-		config.HelpKV{
-			Key:         WatermarkLow,
-			Description: `% of cache use at which to stop cache eviction` + defaultHelpPostfix(WatermarkLow),
-			Optional:    true,
-			Type:        "number",
-		},
-		config.HelpKV{
-			Key:         WatermarkHigh,
-			Description: `% of cache use at which to start cache eviction` + defaultHelpPostfix(WatermarkHigh),
-			Optional:    true,
-			Type:        "number",
-		},
-		config.HelpKV{
-			Key:         Range,
-			Description: `set to "on" or "off" caching of independent range requests per object` + defaultHelpPostfix(Range),
-			Optional:    true,
-			Type:        "string",
-		},
-		config.HelpKV{
-			Key:         Commit,
-			Description: `set to control cache commit behavior` + defaultHelpPostfix(Commit),
-			Optional:    true,
-			Type:        "string",
-		},
-		config.HelpKV{
-			Key:         config.Comment,
-			Description: config.DefaultComment,
-			Optional:    true,
-			Type:        "sentence",
-		},
-	}
-)