remove unnecessary activationEvents entries (#1330)

package.json

@@ -1170,27 +1170,8 @@
     ]
   },
   "activationEvents": [
-    "onLanguage:ocaml",
-    "onLanguage:ocaml.interface",
-    "onLanguage:reason",
-    "onLanguage:ocaml.ocamllex",
-    "onLanguage:ocaml.menhir",
-    "onLanguage:dune",
-    "onLanguage:dune-project",
-    "onLanguage:dune-workspace",
     "onLanguage:cram",
-    "onCommand:ocaml.select-sandbox",
-    "onCommand:ocaml.open-terminal",
-    "onCommand:ocaml.open-terminal-select",
-    "onCommand:ocaml.open-ast-explorer-to-the-side",
-    "onCommand:ocaml.show-preprocessed-document",
-    "onCommand:ocaml.open-pp-editor-and-ast-explorer",
-    "onCommand:ocaml.stop-documentation-server",
-    "onCommand:ocaml.start-debugging",
-    "onCommand:ocaml.goto-closure-code-location",
     "onCommand:ocaml.ask-debug-program",
-    "onCustomEditor:ast-editor",
-    "onCustomEditor:cm-files-editor",
     "workspaceContains:**/dune-workspace",
     "workspaceContains:**/dune",
     "workspaceContains:**/dune-project",