Remove unused references

Author: Scroll-Filbert

public/locales/en/translation.json

@@ -95,12 +95,6 @@
       "sepoliaBlockExplorer": "Scrollscan Explorer",
       "transactionJourney": "Checking Transaction Journey"
     },
-    "whatToBuild": {
-      "whatToBuild": "What to Build",
-      "stablecoinPaymentsTutorial": "Stablecoin Payments Tutorial",
-      "solidityCookbook": "Solidity Cookbook",
-      "privacyDappsWithZk": "Privacy dApps with ZK"
-    },
     "technology": {
       "introduction": "Introduction",
       "principles": "Principles",

public/locales/es/translation.json

@@ -112,12 +112,6 @@
       "sepoliaRollupExplorer": "Explorador de Rollup",
       "sepoliaBlockExplorer": "Explorador de bloques Scrollscan"
     },
-    "whatToBuild": {
-      "whatToBuild": "Qué construir",
-      "stablecoinPaymentsTutorial": "Pagos con Stablecoins",
-      "solidityCookbook": "Recetario de Solidity",
-      "privacyDappsWithZk": "Dapps Privadas con ZK"
-    },
     "technology": {
       "introduction": "Introducción",
       "principles": "Principios",