Revert "feat: initial feature-flagged, new autocompleter MONGOSH-2036 (#2424)"

This reverts commit 493993e.
Startup performance appears to have regressed around ~15 percent.

Author: addaleax

package-lock.json

@@ -29,7 +29,6 @@ export interface InterpreterEnvironment {
  */
 export class OpenContextRuntime implements Runtime {
   private interpreterEnvironment: InterpreterEnvironment;
-  // TODO(MONGOSH-2205): we have to also port this to the new autocomplete
   private autocompleter: ShellApiAutocompleter | null = null;
   private shellEvaluator: ShellEvaluator;
   private instanceState: ShellInstanceState;

packages/browser-runtime-core/src/open-context-runtime.ts

@@ -77,7 +77,6 @@
     "@mongosh/shell-evaluator": "^3.11.0",
     "@mongosh/snippet-manager": "^3.11.0",
     "@mongosh/types": "3.6.2",
-    "@mongodb-js/mongodb-ts-autocomplete": "^0.2.2",
     "@segment/analytics-node": "^1.3.0",
     "ansi-escape-sequences": "^5.1.2",
     "askcharacter": "^2.0.4",