diff --git a/addons/xterm-addon-web-links/src/WebLinkProvider.ts b/addons/xterm-addon-web-links/src/WebLinkProvider.ts
index 23dc8560..5f6460bf 100644
--- a/addons/xterm-addon-web-links/src/WebLinkProvider.ts
+++ b/addons/xterm-addon-web-links/src/WebLinkProvider.ts
@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { ILinkProvider, IBufferCellPosition, ILink, Terminal, IBuffer } from 'xterm';
+import { ILinkProvider, IBufferCellPosition, ILink, Terminal } from 'xterm';
 
 export class WebLinkProvider implements ILinkProvider {
 
diff --git a/addons/xterm-addon-web-links/src/WebLinksAddon.ts b/addons/xterm-addon-web-links/src/WebLinksAddon.ts
index dbc664a8..4e700b57 100644
--- a/addons/xterm-addon-web-links/src/WebLinksAddon.ts
+++ b/addons/xterm-addon-web-links/src/WebLinksAddon.ts
@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { Terminal, ILinkMatcherOptions, ITerminalAddon, ILinkProvider, IDisposable } from 'xterm';
+import { Terminal, ILinkMatcherOptions, ITerminalAddon, IDisposable } from 'xterm';
 import { WebLinkProvider } from './WebLinkProvider';
 
 const protocolClause = '(https?:\\/\\/)';
diff --git a/addons/xterm-addon-webgl/src/WebglRenderer.api.ts b/addons/xterm-addon-webgl/src/WebglRenderer.api.ts
index 591d7fff..daf7f6fc 100644
--- a/addons/xterm-addon-webgl/src/WebglRenderer.api.ts
+++ b/addons/xterm-addon-webgl/src/WebglRenderer.api.ts
@@ -341,10 +341,6 @@ describe('WebGL Renderer Integration Tests', async () => {
       await writeSync(page, data);
       for (let y = 0; y < 240 / 16; y++) {
         for (let x = 0; x < 16; x++) {
-          const cssColor = COLORS_16_TO_255[y * 16 + x];
-          const r = parseInt(cssColor.substr(1, 2), 16);
-          const g = parseInt(cssColor.substr(3, 2), 16);
-          const b = parseInt(cssColor.substr(5, 2), 16);
           await pollFor(page, () => getCellColor(x + 1, y + 1), [0, 0, 0, 255]);
         }
       }
@@ -670,7 +666,6 @@ describe('WebGL Renderer Integration Tests', async () => {
       await writeSync(page, data);
       for (let y = 0; y < 16; y++) {
         for (let x = 0; x < 16; x++) {
-          const i = y * 16 + x;
           await pollFor(page, () => getCellColor(x + 1, y + 1), [0, 0, 0, 255]);
         }
       }
diff --git a/bin/extract_vtfeatures.js b/bin/extract_vtfeatures.js
index e575aeab..63d09684 100644
--- a/bin/extract_vtfeatures.js
+++ b/bin/extract_vtfeatures.js
@@ -1,7 +1,7 @@
 /**
  * Copyright (c) 2019 The xterm.js authors. All rights reserved.
  * @license MIT
- * 
+ *
  * Script to extract vt features documented in docstrings.
  */
 const fs = require('fs');
@@ -265,7 +265,7 @@ To denote the sequences the tables use the same abbreviations as xterm does:
   function hideDetailSections() {
     for (let section of document.getElementsByClassName('sequence-details')) section.style.display = 'none';
   }
-  
+
   function decorateDetailLinks() {
     for (let link of document.getElementsByClassName('link-details')) {
       link.addEventListener("click", toggleDetails, false);
@@ -344,11 +344,11 @@ function applyMacros(s) {
   return s;
 }
 
-function replaceStatus(s) {
-  if (s === 'supported') return '<span title="supported">✓</span>';
-  if (s === 'unsupported') return '<span title="unsupported">✗</span>';
-  return s;
-}
+// function replaceStatus(s) {
+//   if (s === 'supported') return '<span title="supported">✓</span>';
+//   if (s === 'unsupported') return '<span title="unsupported">✗</span>';
+//   return s;
+// }
 
 function createAnchorSlug(s) {
   return s.toLowerCase().split(' ').join('-');
diff --git a/src/browser/input/MoveToCell.ts b/src/browser/input/MoveToCell.ts
index d8f5a498..25e1844d 100644
--- a/src/browser/input/MoveToCell.ts
+++ b/src/browser/input/MoveToCell.ts
@@ -105,11 +105,6 @@ function moveToRequestedCol(startX: number, startY: number, targetX: number, tar
   ).length, sequence(direction, applicationCursor));
 }
 
-function moveHorizontallyOnly(startX: number, startY: number, targetX: number, targetY: number, bufferService: IBufferService, applicationCursor: boolean): string {
-  const direction = horizontalDirection(startX, startY, targetX, targetY, bufferService, applicationCursor);
-  return repeat(Math.abs(startX - targetX), sequence(direction, applicationCursor));
-}
-
 /**
  * Utility functions
  */
diff --git a/src/common/services/CoreService.ts b/src/common/services/CoreService.ts
index df9161e9..883266ec 100644
--- a/src/common/services/CoreService.ts
+++ b/src/common/services/CoreService.ts
@@ -5,7 +5,7 @@
 
 import { ICoreService, ILogService, IOptionsService, IBufferService } from 'common/services/Services';
 import { EventEmitter, IEvent } from 'common/EventEmitter';
-import { IDecPrivateModes, ICharset } from 'common/Types';
+import { IDecPrivateModes } from 'common/Types';
 import { clone } from 'common/Clone';
 
 const DEFAULT_DEC_PRIVATE_MODES: IDecPrivateModes = Object.freeze({