diff --git a/package.json b/package.json
index 9c014ef62..65246e030 100644
--- a/package.json
+++ b/package.json
@@ -211,16 +211,7 @@
           "when": "metals:enabled"
         }
       ]
-    },
-    "debuggers": [
-      {
-        "type": "scala",
-        "label": "Scala Debugger",
-        "languages": [
-          "scala"
-        ]
-      }
-    ]
+    }
   },
   "main": "./out/extension",
   "scripts": {
diff --git a/src/MetalsFeatures.ts b/src/MetalsFeatures.ts
index 685b87444..4c441979c 100644
--- a/src/MetalsFeatures.ts
+++ b/src/MetalsFeatures.ts
@@ -5,12 +5,9 @@ import {
 } from "vscode-languageclient";
 
 export interface TreeViewProvider {}
-export interface DebuggingProvider {}
 
 export class MetalsFeatures implements StaticFeature {
   treeViewProvider?: TreeViewProvider;
-  debuggingProvider?: DebuggingProvider;
-
   fillInitializeParams(params: InitializeParams): void {
     if (!params.capabilities.experimental) {
       params.capabilities.experimental = {};
@@ -21,7 +18,6 @@ export class MetalsFeatures implements StaticFeature {
   initialize(capabilities: ServerCapabilities): void {
     if (capabilities.experimental) {
       this.treeViewProvider = capabilities.experimental.treeViewProvider;
-      this.debuggingProvider = capabilities.experimental.debuggingProvider;
     }
   }
 }
diff --git a/src/client-commands.ts b/src/client-commands.ts
index 7d1725bc7..7fc25cb7a 100644
--- a/src/client-commands.ts
+++ b/src/client-commands.ts
@@ -4,6 +4,5 @@
 export const ClientCommands = {
   toggleLogs: "metals-logs-toggle",
   focusDiagnostics: "metals-diagnostics-focus",
-  runDoctor: "metals-doctor-run",
-  startDebugSession: "metals-debug-session-start"
+  runDoctor: "metals-doctor-run"
 };
diff --git a/src/extension.ts b/src/extension.ts
index 47fd07dff..6e5cb03a8 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -7,9 +7,6 @@ import {
   ExtensionContext,
   window,
   commands,
-  CodeLens,
-  CodeLensProvider,
-  EventEmitter,
   StatusBarAlignment,
   ProgressLocation,
   IndentAction,
@@ -22,7 +19,6 @@ import {
   Uri,
   Range,
   Selection,
-  TextDocument as VscodeTextDocument,
   TextEditorRevealType,
   TextEditor
 } from "vscode";
@@ -57,7 +53,6 @@ import { getJavaOptions } from "./getJavaOptions";
 import { startTreeView } from "./treeview";
 import { MetalsFeatures } from "./MetalsFeatures";
 import { MetalsTreeViewReveal, MetalsTreeViews } from "./tree-view-protocol";
-import * as scalaDebugger from "./scalaDebugger";
 
 const outputChannel = window.createOutputChannel("Metals");
 const openSettingsAction = "Open settings";
@@ -334,40 +329,12 @@ function launchMetals(
           client.outputChannel.show(true);
           channelOpen = true;
         }
-      },
-      startDebugSession: args => {
-        if (!features.debuggingProvider) return;
-
-        scalaDebugger.start(args).then(wasStarted => {
-          if (!wasStarted) {
-            window.showErrorMessage("Debug session not started");
-          }
-        });
       }
     };
     Object.entries(clientCommands).forEach(([name, command]) =>
       registerCommand(name, command)
     );
 
-    // should be the compilation of a currently opened file
-    // but some race conditions may apply
-    let compilationDoneEmitter = new EventEmitter<void>();
-
-    let codeLensRefresher: CodeLensProvider = {
-      onDidChangeCodeLenses: compilationDoneEmitter.event,
-      provideCodeLenses: (
-        document: VscodeTextDocument,
-        token: CancellationToken
-      ) => undefined,
-      resolveCodeLens: (codeLens: CodeLens, token: CancellationToken) =>
-        undefined
-    };
-
-    languages.registerCodeLensProvider(
-      { scheme: "file", language: "scala" },
-      codeLensRefresher
-    );
-
     // Handle the metals/executeClientCommand extension notification.
     client.onNotification(ExecuteClientCommand.type, params => {
       const isRun = params.command === "metals-doctor-run";
@@ -401,9 +368,6 @@ function launchMetals(
                 });
             }
             break;
-          case "metals-model-refresh":
-            compilationDoneEmitter.fire();
-            break;
           default:
             outputChannel.appendLine(`unknown command: ${params.command}`);
         }
@@ -576,14 +540,6 @@ function launchMetals(
       treeViews = startTreeView(client, outputChannel, context, viewIds);
       context.subscriptions.concat(treeViews.disposables);
     }
-    if (features.debuggingProvider) {
-      scalaDebugger
-        .initialize(outputChannel)
-        .forEach(disposable => context.subscriptions.push(disposable));
-      registerCommand(scalaDebugger.startSessionCommand, scalaDebugger.start);
-    } else {
-      outputChannel.appendLine("Debugging Scala sources is not supported");
-    }
   });
 }
 
diff --git a/src/scalaDebugger.ts b/src/scalaDebugger.ts
deleted file mode 100644
index d8e63b9c7..000000000
--- a/src/scalaDebugger.ts
+++ /dev/null
@@ -1,65 +0,0 @@
-import * as vscode from "vscode";
-import {
-  CancellationToken,
-  DebugConfiguration,
-  Disposable,
-  ProviderResult,
-  WorkspaceFolder
-} from "vscode";
-
-export const startAdapterCommand = "debug-adapter-start";
-export const startSessionCommand = "metals-debug-session-start";
-const configurationType = "scala";
-
-export function initialize(outputChannel: vscode.OutputChannel): Disposable[] {
-  outputChannel.appendLine("Initializing Scala Debugger");
-  return [
-    vscode.debug.registerDebugConfigurationProvider(
-      configurationType,
-      new ScalaConfigProvider()
-    )
-  ];
-}
-
-export async function start(parameters: any): Promise<Boolean> {
-  return vscode.commands
-    .executeCommand<DebugSession>(startAdapterCommand, parameters)
-    .then(response => {
-      if (response === undefined) return false;
-
-      const debugServer = vscode.Uri.parse(response.uri);
-      const segments = debugServer.authority.split(":");
-      const port = parseInt(segments[segments.length - 1]);
-
-      const configuration: vscode.DebugConfiguration = {
-        type: configurationType,
-        name: response.name,
-        request: "launch",
-        debugServer: port // note: MUST be a number. vscode magic - automatically connects to the server
-      };
-
-      return vscode.debug.startDebugging(undefined, configuration);
-    });
-}
-
-class ScalaConfigProvider implements vscode.DebugConfigurationProvider {
-  provideDebugConfigurations(
-    folder: WorkspaceFolder | undefined,
-    token?: CancellationToken
-  ): ProviderResult<DebugConfiguration[]> {
-    return [];
-  }
-
-  resolveDebugConfiguration(
-    folder: WorkspaceFolder | undefined,
-    debugConfiguration: DebugConfiguration,
-    token?: CancellationToken
-  ): ProviderResult<DebugConfiguration> {
-    return debugConfiguration;
-  }
-}
-
-export interface DebugSession {
-  name: string;
-  uri: string;
-}