removed unused imports

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/dotnet/AbstractCSharpCodegen.java

@@ -8,7 +8,6 @@
 import io.swagger.codegen.v3.CodegenModel;
 import io.swagger.codegen.v3.CodegenOperation;
 import io.swagger.codegen.v3.CodegenProperty;
-import io.swagger.codegen.v3.ISchemaHandler;
 import io.swagger.codegen.v3.generators.DefaultCodegenConfig;
 import io.swagger.codegen.v3.generators.handlebars.csharp.CsharpHelper;
 import io.swagger.codegen.v3.generators.handlebars.lambda.CamelCaseLambda;

src/main/java/io/swagger/codegen/v3/generators/dotnet/AspNetCoreServerCodegen.java

@@ -2,15 +2,12 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.samskivert.mustache.Mustache;
-import io.swagger.codegen.v3.CodegenArgument;
 import io.swagger.codegen.v3.CodegenConstants;
 import io.swagger.codegen.v3.CodegenContent;
 import io.swagger.codegen.v3.CodegenOperation;
 import io.swagger.codegen.v3.CodegenSecurity;
 import io.swagger.codegen.v3.CodegenType;
 import io.swagger.codegen.v3.SupportingFile;
-import io.swagger.codegen.v3.generators.handlebars.ExtensionHelper;
-import io.swagger.codegen.v3.utils.URLPathUtil;
 import io.swagger.v3.core.util.Json;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.security.SecurityScheme;
@@ -19,11 +16,9 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.File;
-import java.net.URL;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.stream.Collectors;
 
 import static io.swagger.codegen.v3.generators.handlebars.ExtensionHelper.getBooleanValue;