[REFACTOR] Remove unused PasswordEncoderConfig and SecurityConfig classes

src/main/java/com/safetypin/authentication/security/PasswordEncoderConfig.java

-package com.safetypin.authentication.security;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
-import org.springframework.security.crypto.password.PasswordEncoder;
-
-@Configuration
-public class PasswordEncoderConfig {
-    @Bean
-    public PasswordEncoder passwordEncoder() {
-        return new BCryptPasswordEncoder();
-    }
-}

src/main/java/com/safetypin/authentication/security/SecurityConfig.java

-package com.safetypin.authentication.security;
-
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.authentication.AuthenticationManager;
-import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
-import org.springframework.security.config.http.SessionCreationPolicy;
-import org.springframework.security.web.SecurityFilterChain;
-
-@Configuration
-public class SecurityConfig {
-
-    @Bean
-    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
-        http
-                // CSRF protection is enabled by default, so we don't disable it here
-                // disable CSRF
-                .csrf().disable()
-                .authorizeHttpRequests(auth -> auth
-                        .requestMatchers("/**").permitAll() // Allow all requests
-                )
-                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS)) // No session
-                .formLogin(AbstractHttpConfigurer::disable) // Disable login page
-                .httpBasic(AbstractHttpConfigurer::disable); // Disable basic authentication
-
-        return http.build();
-    }
-
-    @Bean
-    public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
-        return authenticationConfiguration.getAuthenticationManager();
-    }
-}