Remove legacy techdocs-common package

Signed-off-by: Eric Peterson <ericpeterson@spotify.com>

packages/techdocs-common/.eslintrc.js

@@ -1 +0,0 @@
-module.exports = require('@backstage/cli/config/eslint-factory')(__dirname);

packages/techdocs-common/README.md

@@ -1,5 +0,0 @@
-# @backstage/techdocs-common
-
-This package has been moved to `@backstage/plugin-techdocs-node` and is no
-longer maintained. Please update any dependencies you have on this package
-accordingly.

packages/techdocs-common/api-report.md

@@ -1,9 +0,0 @@
-## API Report File for "@backstage/techdocs-common"
-
-> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
-
-```ts
-export * from '@backstage/plugin-techdocs-node';
-
-// (No @packageDocumentation comment for this package)
-```

packages/techdocs-common/package.json

@@ -1,47 +0,0 @@
-{
-  "name": "@backstage/techdocs-common",
-  "description": "No longer maintained. Use @backstage/plugin-techdocs-node instead.",
-  "version": "0.11.16-next.2",
-  "main": "src/index.ts",
-  "types": "src/index.ts",
-  "private": false,
-  "publishConfig": {
-    "access": "public",
-    "main": "dist/index.cjs.js",
-    "types": "dist/index.d.ts"
-  },
-  "backstage": {
-    "role": "node-library"
-  },
-  "homepage": "https://backstage.io",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/backstage/backstage",
-    "directory": "packages/techdocs-common"
-  },
-  "license": "Apache-2.0",
-  "files": [
-    "dist"
-  ],
-  "scripts": {
-    "build": "backstage-cli package build",
-    "lint": "backstage-cli package lint",
-    "test": "backstage-cli package test",
-    "prepack": "backstage-cli package prepack",
-    "postpack": "backstage-cli package postpack",
-    "clean": "backstage-cli package clean",
-    "start": "backstage-cli package start"
-  },
-  "bugs": {
-    "url": "https://github.com/backstage/backstage/issues"
-  },
-  "dependencies": {
-    "@backstage/plugin-techdocs-node": "1.1.2-next.2"
-  },
-  "devDependencies": {},
-  "jest": {
-    "roots": [
-      ".."
-    ]
-  }
-}

packages/techdocs-common/src/index.ts

@@ -1,17 +0,0 @@
-/*
- * Copyright 2020 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-export * from '@backstage/plugin-techdocs-node';