Remove unused imports and code from project/src/App.tsx

Removed unused imports and state variables that were causing TypeScript build errors:
- Removed YachtSearch import (not used)
- Removed calculateTripCarbon import (not used)
- Removed getVesselData import (only used in unused handleSearch)
- Removed CarbonCalculation type import (not used)
- Removed unused state variables: loading, error, vesselData
- Removed unused handleSearch function

This fixes the Docker build failure: 'YachtSearch' is declared but its value is never read.

project/src/App.tsx

@@ -2,16 +2,13 @@ import { useState, useEffect } from 'react';
 import { Bird, Menu, X } from 'lucide-react';
 import { motion, AnimatePresence } from 'framer-motion';
 import { Home } from './components/Home';
-import { YachtSearch } from './components/YachtSearch';
 import { TripCalculator } from './components/TripCalculator';
 import { HowItWorks } from './components/HowItWorks';
 import { About } from './components/About';
 import { Contact } from './components/Contact';
 import { OffsetOrder } from './components/OffsetOrder';
-import { getVesselData } from './api/aisClient';
-import { calculateTripCarbon } from './utils/carbonCalculator';
 import { analytics } from './utils/analytics';
-import type { VesselData, CarbonCalculation, CalculatorType } from './types';
+import type { VesselData, CalculatorType } from './types';
 
 const sampleVessel: VesselData = {
   imo: "1234567",
@@ -23,9 +20,6 @@ const sampleVessel: VesselData = {
 };
 
 function App() {
-  const [loading, setLoading] = useState(false);
-  const [error, setError] = useState<string | null>(null);
-  const [vesselData, setVesselData] = useState<VesselData | null>(null);
   const [currentPage, setCurrentPage] = useState<'home' | 'calculator' | 'how-it-works' | 'about' | 'contact'>('home');
   const [showOffsetOrder, setShowOffsetOrder] = useState(false);
   const [offsetTons, setOffsetTons] = useState(0);
@@ -37,21 +31,6 @@ function App() {
     analytics.pageView(window.location.pathname);
   }, [currentPage]);
 
-  const handleSearch = async (imo: string) => {
-    setLoading(true);
-    setError(null);
-    setVesselData(null);
-    
-    try {
-      const vessel = await getVesselData(imo);
-      setVesselData(vessel);
-    } catch (err) {
-      setError('Unable to fetch vessel data. Please verify the IMO number and try again.');
-    } finally {
-      setLoading(false);
-    }
-  };
-
   const handleOffsetClick = (tons: number, monetaryAmount?: number) => {
     setOffsetTons(tons);
     setMonetaryAmount(monetaryAmount);