Update comment, remove redundant null check

Author: Aleksi Pekkala

src/driver/BaseDriver.ts

@@ -135,7 +135,7 @@ export abstract class BaseDriver {
 
     protected transformResult(result: any, action: ActionMetadata, options: Action): any {
         // check if we need to transform result
-        const shouldTransform = (this.useClassTransformer && this.useResponseClassTransformer && result != null) // transform only if enabled and value exist
+        const shouldTransform = (this.useClassTransformer && this.useResponseClassTransformer) // transform only if both general and response-specific transformation is enabled
             && result instanceof Object // don't transform primitive types (string/number/boolean)
             && !(
                 result instanceof Uint8Array // don't transform binary data