Update rounded_corner.md

Author: taohsu

components/control/text_input/dsm/guideline/rounded_corner.md

@@ -1,20 +1,3 @@
 **`False`** For a square finish.
 
 **`True`** For a finish with rounded corner. To be favored in more emotional, immersive contexts or those tied to specific visual identities. For standard or business-oriented journeys, keep the default corners. This evolution addresses the need for flexibility in adapting the design to certain brand contexts.
-
-### Do & don'ts
-
-✅ **Do:** Use square corners as the default for business-oriented applications and standard enterprise forms.  
-❌ **Don't:** Apply rounded corners inconsistently across different input fields within the same interface.
-
-✅ **Do:** Consider rounded corners when the overall brand identity uses soft, approachable visual language.  
-❌ **Don't:** Mix square and rounded corners on the same page unless they serve distinct semantic purposes.
-
-✅ **Do:** Match the corner radius of text inputs with other interactive elements (buttons, cards) in the same context.  
-❌ **Don't:** Use extremely large corner radii that distort the input proportions or reduce usable input area.
-
-✅ **Do:** Apply rounded corners for consumer-facing, lifestyle, or entertainment products where warmth is desired.  
-❌ **Don't:** Override established brand guidelines just for aesthetic preference—align with the design system.
-
-✅ **Do:** Ensure the corner style choice is documented and applied systematically through design tokens.  
-❌ **Don't:** Hardcode corner values individually—use design tokens to maintain consistency and enable theming.