Apply suggestions from code review

Author: philipp-spiess

packages/@tailwindcss-upgrade/src/codemods/migrate-import.ts

@@ -38,7 +38,6 @@ export function migrateImport({
 
       let params = parseImportParams(ValueParser.parse(firstParam))
 
-      // check if the file exists
       let fullPath = resolve(dirname(file), params.uri)
       if (extname(fullPath) === '') fullPath += '.css'