fix: revert README changes, keep only SKILL.md addition

Author: MerkleMoltBot

README.md

@@ -24,8 +24,6 @@ moltbot-skills/
 │   └── SKILL.md
 ├── neynar/                       # Neynar (placeholder)
 │   └── SKILL.md
-├── qrcoin/                       # QR Coin (community)
-│   └── SKILL.md
 └── zapper/                       # Zapper (placeholder)
     └── SKILL.md
 ```
@@ -37,7 +35,6 @@ moltbot-skills/
 | [bankr](https://bankr.bot) | [bankr](bankr/) | AI-powered crypto trading agent via natural language. Trade, manage portfolios, automate DeFi operations. |
 | base | — | Placeholder |
 | neynar | — | Placeholder |
-| [qrcoin](https://qrcoin.fun) | [qrcoin](qrcoin/) | QR code auction platform on Base. Bid to display URLs on QR codes. |
 | zapper | — | Placeholder |
 
 ## Install Instructions