Clean up edit predictions settings (#24692)

This PR does some clean up for the edit predictions settings:

- Removed `editor.show_edit_predictions_in_menu`
- Renamed `edit_predictions.inline_preview` to `edit_predictions.mode`

Release Notes:

- N/A

---------

Co-authored-by: Agus Zubiaga <agus@zed.dev>

crates/editor/src/editor.rs

@@ -95,8 +95,8 @@ use itertools::Itertools;
 use language::{
     language_settings::{self, all_language_settings, language_settings, InlayHintSettings},
     markdown, point_from_lsp, AutoindentMode, BracketPair, Buffer, Capability, CharKind, CodeLabel,
-    CompletionDocumentation, CursorShape, Diagnostic, EditPreview, HighlightedText, IndentKind,
-    IndentSize, InlineCompletionPreviewMode, Language, OffsetRangeExt, Point, Selection,
+    CompletionDocumentation, CursorShape, Diagnostic, EditPredictionsMode, EditPreview,
+    HighlightedText, IndentKind, IndentSize, Language, OffsetRangeExt, Point, Selection,
     SelectionGoal, TextObject, TransactionId, TreeSitterOptions,
 };
 use language::{point_to_lsp, BufferRow, CharClassifier, Runnable, RunnableRange};
@@ -5047,7 +5047,6 @@ impl Editor {
         );
 
         let show_in_menu = by_provider
-            && EditorSettings::get_global(cx).show_edit_predictions_in_menu
             && self
                 .edit_prediction_provider
                 .as_ref()
@@ -5055,9 +5054,8 @@ impl Editor {
                     provider.provider.show_completions_in_menu()
                 });
 
-        let preview_requires_modifier = all_language_settings(file, cx)
-            .inline_completions_preview_mode()
-            == InlineCompletionPreviewMode::WhenHoldingModifier;
+        let preview_requires_modifier =
+            all_language_settings(file, cx).edit_predictions_mode() == EditPredictionsMode::Auto;
 
         EditPredictionSettings::Enabled {
             show_in_menu,

crates/editor/src/editor_settings.rs

@@ -35,7 +35,6 @@ pub struct EditorSettings {
     pub auto_signature_help: bool,
     pub show_signature_help_after_edits: bool,
     pub jupyter: Jupyter,
-    pub show_edit_predictions_in_menu: bool,
 }
 
 #[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
@@ -368,12 +367,6 @@ pub struct EditorSettingsContent {
     /// Default: false
     pub show_signature_help_after_edits: Option<bool>,
 
-    /// Whether to show the edit predictions next to the completions provided by a language server.
-    /// Only has an effect if edit prediction provider supports it.
-    ///
-    /// Default: true
-    pub show_edit_predictions_in_menu: Option<bool>,
-
     /// Jupyter REPL settings.
     pub jupyter: Option<JupyterContent>,
 }