diff --git a/packages/compiler-cli/src/metadata/bundler.ts b/packages/compiler-cli/src/metadata/bundler.ts
index d071bc7768..7eb0c56d16 100644
--- a/packages/compiler-cli/src/metadata/bundler.ts
+++ b/packages/compiler-cli/src/metadata/bundler.ts
@@ -8,10 +8,11 @@
 import * as path from 'path';
 import * as ts from 'typescript';
 
-import {MetadataCollector} from '../metadata/collector';
-import {ClassMetadata, ConstructorMetadata, FunctionMetadata, METADATA_VERSION, MemberMetadata, MetadataEntry, MetadataError, MetadataImportedSymbolReferenceExpression, MetadataMap, MetadataObject, MetadataSymbolicExpression, MetadataSymbolicReferenceExpression, MetadataValue, MethodMetadata, ModuleExportMetadata, ModuleMetadata, isClassMetadata, isConstructorMetadata, isFunctionMetadata, isInterfaceMetadata, isMetadataError, isMetadataGlobalReferenceExpression, isMetadataImportedSymbolReferenceExpression, isMetadataModuleReferenceExpression, isMetadataSymbolicExpression, isMethodMetadata} from '../metadata/schema';
 import {MetadataCache} from '../transformers/metadata_cache';
 
+import {MetadataCollector} from './collector';
+import {ClassMetadata, ConstructorMetadata, FunctionMetadata, METADATA_VERSION, MemberMetadata, MetadataEntry, MetadataError, MetadataImportedSymbolReferenceExpression, MetadataMap, MetadataObject, MetadataSymbolicExpression, MetadataSymbolicReferenceExpression, MetadataValue, MethodMetadata, ModuleExportMetadata, ModuleMetadata, isClassMetadata, isConstructorMetadata, isFunctionMetadata, isInterfaceMetadata, isMetadataError, isMetadataGlobalReferenceExpression, isMetadataImportedSymbolReferenceExpression, isMetadataModuleReferenceExpression, isMetadataSymbolicExpression, isMethodMetadata} from './schema';
+
 
 
 // The character set used to produce private names.
diff --git a/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts b/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
index b6539e5a19..c3808a60d9 100644
--- a/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
+++ b/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
@@ -202,7 +202,7 @@ function pickIdentifier(
     context: ts.SourceFile, primary: ts.Identifier, secondaries: ts.Identifier[],
     mode: ImportMode): ts.Identifier|null {
   context = ts.getOriginalNode(context) as ts.SourceFile;
-  let localIdentifier: ts.Identifier|null = null;
+
   if (ts.getOriginalNode(primary).getSourceFile() === context) {
     return primary;
   } else if (mode === ImportMode.UseExistingImport) {
diff --git a/packages/compiler-cli/src/ngtsc/program.ts b/packages/compiler-cli/src/ngtsc/program.ts
index 79901cf2be..84d6919c4a 100644
--- a/packages/compiler-cli/src/ngtsc/program.ts
+++ b/packages/compiler-cli/src/ngtsc/program.ts
@@ -140,8 +140,7 @@ export class NgtscProgram implements api.Program {
          sourceFiles: ReadonlyArray<ts.SourceFile>) => {
           if (fileName.endsWith('.d.ts')) {
             data = sourceFiles.reduce(
-                (data, sf) => this.compilation !.transformedDtsFor(sf.fileName, data, fileName),
-                data);
+                (data, sf) => this.compilation !.transformedDtsFor(sf.fileName, data), data);
           }
           this.host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles);
         };
diff --git a/packages/compiler-cli/src/ngtsc/transform/src/compilation.ts b/packages/compiler-cli/src/ngtsc/transform/src/compilation.ts
index 6789d0e807..318c2822a4 100644
--- a/packages/compiler-cli/src/ngtsc/transform/src/compilation.ts
+++ b/packages/compiler-cli/src/ngtsc/transform/src/compilation.ts
@@ -192,7 +192,7 @@ export class IvyCompilation {
    * Process a .d.ts source string and return a transformed version that incorporates the changes
    * made to the source file.
    */
-  transformedDtsFor(tsFileName: string, dtsOriginalSource: string, dtsPath: string): string {
+  transformedDtsFor(tsFileName: string, dtsOriginalSource: string): string {
     // No need to transform if no changes have been requested to the input file.
     if (!this.dtsMap.has(tsFileName)) {
       return dtsOriginalSource;
diff --git a/packages/compiler-cli/src/ngtsc/transform/src/declaration.ts b/packages/compiler-cli/src/ngtsc/transform/src/declaration.ts
index fbb4cee703..495886d45e 100644
--- a/packages/compiler-cli/src/ngtsc/transform/src/declaration.ts
+++ b/packages/compiler-cli/src/ngtsc/transform/src/declaration.ts
@@ -8,8 +8,6 @@
 
 import * as ts from 'typescript';
 
-import {relativePathBetween} from '../../util/src/path';
-
 import {CompileResult} from './api';
 import {ImportManager, translateType} from './translator';
 
diff --git a/packages/compiler-cli/src/ngtsc/transform/src/translator.ts b/packages/compiler-cli/src/ngtsc/transform/src/translator.ts
index dc4b69c1f2..c8067167ad 100644
--- a/packages/compiler-cli/src/ngtsc/transform/src/translator.ts
+++ b/packages/compiler-cli/src/ngtsc/transform/src/translator.ts
@@ -310,7 +310,7 @@ export class TypeTranslatorVisitor implements ExpressionVisitor, TypeVisitor {
     const exprStr = type.value.visitExpression(this, context);
     if (type.typeParams !== null) {
       const typeSegments = type.typeParams.map(param => param.visitType(this, context));
-      return `${exprStr}<${typeSegments.join(',')}>`;
+      return `${exprStr}<${typeSegments.join(', ')}>`;
     } else {
       return exprStr;
     }
@@ -412,7 +412,7 @@ export class TypeTranslatorVisitor implements ExpressionVisitor, TypeVisitor {
 
   visitLiteralArrayExpr(ast: LiteralArrayExpr, context: Context): string {
     const values = ast.entries.map(expr => expr.visitExpression(this, context));
-    return `[${values.join(',')}]`;
+    return `[${values.join(', ')}]`;
   }
 
   visitLiteralMapExpr(ast: LiteralMapExpr, context: Context) {
@@ -434,4 +434,4 @@ export class TypeTranslatorVisitor implements ExpressionVisitor, TypeVisitor {
   visitTypeofExpr(ast: TypeofExpr, context: Context): string {
     return `typeof ${ast.expr.visitExpression(this, context)}`;
   }
-}
\ No newline at end of file
+}
diff --git a/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts b/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
index c27411238b..9bb8ef85e3 100644
--- a/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
+++ b/packages/compiler-cli/test/ngtsc/ngtsc_spec.ts
@@ -405,7 +405,7 @@ describe('ngtsc behavioral tests', () => {
 
     const dtsContents = getContents('test.d.ts');
     expect(dtsContents)
-        .toContain('i0.ɵNgModuleDef<TestModule, [typeof TestPipe,typeof TestCmp], never, never>');
+        .toContain('i0.ɵNgModuleDef<TestModule, [typeof TestPipe, typeof TestCmp], never, never>');
   });
 
   it('should unwrap a ModuleWithProviders function if a generic type is provided for it', () => {