remove downlevel-dts

.projenrc.ts

@@ -216,7 +216,6 @@ project.addDeps(
   '@jsii/spec',
   'case',
   'chalk@^4',
-  'downlevel-dts',
   'fast-deep-equal',
   'log4js',
   'semver',

src/compiler.ts

@@ -6,9 +6,7 @@ import * as ts from 'typescript';
 
 import { Assembler } from './assembler';
 import { findDependencyDirectory } from './common/find-utils';
-import { emitDownleveledDeclarations, TYPES_COMPAT } from './downlevel-dts';
 import { Emitter } from './emitter';
-import { normalizeConfigPath } from './helpers';
 import { JsiiDiagnostic } from './jsii-diagnostic';
 import { ProjectInfo } from './project-info';
 import { WARNINGSCODE_FILE_NAME } from './transforms/deprecation-warnings';
@@ -21,6 +19,7 @@ import * as utils from './utils';
 const LOG = log4js.getLogger('jsii/compiler');
 export const DIAGNOSTICS = 'diagnostics';
 export const JSII_DIAGNOSTICS_CODE = 9999;
+export const TYPES_COMPAT = '.types-compat';
 
 export interface CompilerOptions {
   /** The information about the project to be built */
@@ -314,15 +313,6 @@ export class Compiler implements Emitter {
       LOG.error('Compilation errors prevented the JSII assembly from being created');
     }
 
-    if (!hasErrors) {
-      emitDownleveledDeclarations(
-        this.projectRoot,
-        this.options.projectInfo.packageJson,
-        // outDir might be absolute. Need to normalize it.
-        normalizeConfigPath(this.projectRoot, this.tsconfig.compilerOptions.outDir),
-      );
-    }
-
     // Some extra validation on the config.
     // Make sure that { "./.warnings.jsii.js": "./.warnings.jsii.js" } is in the set of
     // exports, if they are specified.

test/compiler.test.ts

@@ -3,8 +3,7 @@ import { tmpdir } from 'node:os';
 import { dirname, join } from 'node:path';
 import { loadAssemblyFromPath, SPEC_FILE_NAME, SPEC_FILE_NAME_COMPRESSED } from '@jsii/spec';
 import { compile, Lock } from './fixtures';
-import { Compiler } from '../src/compiler';
-import { TYPES_COMPAT } from '../src/downlevel-dts';
+import { Compiler, TYPES_COMPAT } from '../src/compiler';
 import { ProjectInfo } from '../src/project-info';
 import { TypeScriptConfigValidationRuleSet } from '../src/tsconfig';
 import { TypeScriptConfigValidator } from '../src/tsconfig/tsconfig-validator';