Remove alt-tab / alt-enter binds in vim keymap, as they are in base (#24598)

Was unnecessary to include these in #24596 as they will be available
from the base keymap.

Release Notes:

- N/A

Co-authored-by: Conrad <conrad@zed.dev>

assets/keymaps/vim.json

@@ -695,18 +695,6 @@
       "shift-u": "git::UnstageAll"
     }
   },
-  {
-    "context": "os == macos && edit_prediction",
-    "bindings": {
-      "alt-tab": "editor::AcceptEditPrediction"
-    }
-  },
-  {
-    "context": "os != macos && edit_prediction",
-    "bindings": {
-      "alt-enter": "editor::AcceptEditPrediction"
-    }
-  },
   {
     "context": "edit_prediction && !edit_prediction_requires_modifier",
     "bindings": {