[Analysis API FIR] do not check for write access on inside ShortenCommandImpl as it breaks intention preview in IDE

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirReferenceShortener.kt

@@ -625,8 +625,6 @@ private class ShortenCommandImpl(
 ) : ShortenCommand {
 
     override fun invokeShortening() {
-        ApplicationManager.getApplication().assertWriteAccessAllowed()
-
         for (nameToImport in importsToAdd) {
             addImportToFile(targetFile.project, targetFile, nameToImport)
         }