feat: remove logLevel support in config

docs/usage/self-hosted-configuration.md

@@ -225,18 +225,6 @@ If left as default (null), a random short ID will be selected.
 
 ## logFileLevel
 
-## logLevel
-
-We recommend that you run the Renovate bot at the debug level if you can.
-Use the environment variable `LOG_LEVEL=debug` to run Renovate at the debug level.
-
-When you use `LOG_LEVEL=debug`, debug logging starts from the beginning of the app.
-If you had configured debug logging in a file config, then the debug logging starts _after_ the file config is parsed.
-
-Additionally, if you configure `LOG_FORMAT=json` in env then logging will be done in JSON format instead of "pretty" format, which is usually better if you're doing any ingestion or parsing of the logs.
-
-Warning: Configuring `logLevel` config option or `--log-level` cli option is deprecated and will be removed in a major version.
-
 ## onboarding
 
 Set this to `false` only if all three statements are true:

lib/config/definitions.ts

@@ -275,13 +275,6 @@ const options: RenovateOptions[] = [
     admin: true,
   },
   // Log options
-  {
-    name: 'logLevel',
-    description: 'Logging level. Deprecated, use `LOG_LEVEL` environment.',
-    stage: 'global',
-    type: 'string',
-    allowedValues: ['fatal', 'error', 'warn', 'info', 'debug', 'trace'],
-  },
   {
     name: 'logFile',
     description: 'Log file path.',

lib/config/index.ts

@@ -1,4 +1,4 @@
-import { addStream, levels, logger, setContext } from '../logger';
+import { addStream, logger, setContext } from '../logger';
 import { get, getLanguageList, getManagerList } from '../manager';
 import { ensureDir, getSubDirectory, readFile } from '../util/fs';
 import { ensureTrailingSlash } from '../util/url';
@@ -84,15 +84,6 @@ export async function parseConfigs(
     delete config.privateKeyPath;
   }
 
-  // Deprecated set log level: https://github.com/renovatebot/renovate/issues/8291
-  // istanbul ignore if
-  if (config.logLevel) {
-    logger.warn(
-      'Configuring logLevel in CLI or file is deprecated. Use LOG_LEVEL environment variable instead'
-    );
-    levels('stdout', config.logLevel);
-  }
-
   if (config.logContext) {
     // This only has an effect if logContext was defined via file or CLI, otherwise it would already have been detected in env
     setContext(config.logContext);

lib/config/types.ts

@@ -74,7 +74,6 @@ export interface GlobalOnlyConfig {
   gitPrivateKey?: string;
   logFile?: string;
   logFileLevel?: LogLevel;
-  logLevel?: LogLevel;
   prCommitsPerRunLimit?: number;
   privateKeyPath?: string;
   redisUrl?: string;