Fix compilation errors and resolve ESLint warnings across multiple components

frontend/src/components/Landing/EnterpriseCTA.tsx

@@ -10,7 +10,7 @@ import {
   alpha
 } from '@mui/material';
 import OptimizedImage from './OptimizedImage';
-import { SignInButton, useClerk } from '@clerk/clerk-react';
+import { useClerk } from '@clerk/clerk-react';
 import { RocketLaunch } from '@mui/icons-material';
 import { motion } from 'framer-motion';
 import { ScrambleText } from '../ScrambleText';

frontend/src/components/Landing/HeroSection.tsx

@@ -10,7 +10,7 @@ import {
   useTheme,
   alpha
 } from '@mui/material';
-import { SignInButton, useClerk } from '@clerk/clerk-react';
+import { useClerk } from '@clerk/clerk-react';
 import {
   RocketLaunch,
   Lightbulb,

frontend/src/components/Landing/IntroducingAlwrity.tsx

@@ -12,7 +12,7 @@ import {
   alpha,
   Skeleton
 } from '@mui/material';
-import { SignInButton, useClerk } from '@clerk/clerk-react';
+import { useClerk } from '@clerk/clerk-react';
 import {
   RocketLaunch,
   Business,

frontend/src/components/Landing/Landing.tsx

@@ -18,11 +18,6 @@ import {
 import { keyframes } from '@mui/system';
 import {
   Analytics,
-  Psychology,
-  AccessTime,
-  MonetizationOn,
-  TrendingDown,
-  Group,
   CalendarToday,
   Create,
   Publish,