Remove redundant TreeDataProvider registrations

Author: Colin Grant

src/ast.ts

@@ -47,7 +47,6 @@ class ASTFeature implements vscodelc.StaticFeature {
             // @ts-ignore
             tree.reveal(null);
         }),
-        vscode.window.registerTreeDataProvider('clangd.ast', adapter),
         // Create the "Show AST" command for the context menu.
         // It's only shown if the feature is dynamicaly available (package.json)
         vscode.commands.registerTextEditorCommand(

src/type-hierarchy.ts

@@ -169,9 +169,6 @@ class TypeHierarchyProvider implements
   constructor(context: ClangdContext) {
     this.client = context.client;
 
-    context.subscriptions.push(vscode.window.registerTreeDataProvider(
-        'clangd.typeHierarchyView', this));
-
     context.subscriptions.push(vscode.commands.registerTextEditorCommand(
         'clangd.typeHierarchy', this.reveal, this));
     context.subscriptions.push(vscode.commands.registerCommand(