revert: "fix: pnpm add a-module-already-in-dev-deps should show message that it wasn't moved to dependencies (#7319)"

This reverts commit 45bdc79b17.

.changeset/perfect-rats-attack.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/default-reporter": patch
+---
+
+Revert warning about type of dependency.

cli/default-reporter/src/reporterForClient/reportSummary.ts

@@ -71,11 +71,6 @@ export function reportSummary (
             msg += EOL
             msg += _printDiffs(diffs)
             msg += EOL
-            if (depType === 'dev' && opts.pnpmConfig?.saveDev === false) {
-              msg += EOL
-              msg += `The dependency was already listed in devDependencies.${EOL}If you want to make it a prod dependency, then move it manually.`
-              msg += EOL
-            }
           } else if (opts.pnpmConfig?.[CONFIG_BY_DEP_TYPE[depType]] === false) {
             msg += EOL
             msg += `${chalk.cyanBright(`${propertyByDependencyType[depType] as string}:`)} skipped`