fix: don't print warnings about unknown settings (#3160)

close #3159

.changeset/nervous-fishes-repair.md

@@ -0,0 +1,5 @@
+---
+"pnpm": patch
+---
+
+Turn off warnings about settings.

packages/pnpm/src/main.ts

@@ -88,13 +88,12 @@ export default async function run (inputArgv: string[]) {
     // When we just want to print the location of the global bin directory,
     // we don't need the write permission to it. Related issue: #2700
     const globalDirShouldAllowWrite = cmd !== 'root'
-    const checkUnknownSetting = cmd === 'install'
     config = await getConfig(cliOptions, {
       excludeReporter: false,
       globalDirShouldAllowWrite,
       rcOptionsTypes,
       workspaceDir,
-      checkUnknownSetting,
+      checkUnknownSetting: false,
     }) as typeof config
     config.forceSharedLockfile = typeof config.workspaceDir === 'string' && config.sharedWorkspaceLockfile === true
     config.argv = argv