Remove some outdated comments (#52432)

Finn Evers created 

These comments come from the scaffolding script for new crates, yet are
no longer relevant in the given files. Thus, just removing them here to
do some 🧹

Release Notes:

- N/A

Change summary

crates/language_onboarding/Cargo.toml | 6 ------
crates/settings_content/Cargo.toml    | 6 ------
crates/settings_json/Cargo.toml       | 6 ------
3 files changed, 18 deletions(-)

Detailed changes

crates/language_onboarding/Cargo.toml 🔗 

@@ -21,9 +21,3 @@ gpui.workspace = true
 project.workspace = true
 ui.workspace = true
 workspace.workspace = true
-
-# Uncomment other workspace dependencies as needed
-# assistant.workspace = true
-# client.workspace = true
-# project.workspace = true
-# settings.workspace = true

crates/settings_content/Cargo.toml 🔗 

@@ -28,9 +28,3 @@ settings_json.workspace = true
 settings_macros.workspace = true
 strum.workspace = true
 util.workspace = true
-
-# Uncomment other workspace dependencies as needed
-# assistant.workspace = true
-# client.workspace = true
-# project.workspace = true
-# settings.workspace = true

crates/settings_json/Cargo.toml 🔗 

@@ -27,9 +27,3 @@ serde_path_to_error.workspace = true
 [dev-dependencies]
 unindent.workspace = true
 pretty_assertions.workspace = true
-
-# Uncomment other workspace dependencies as needed
-# assistant.workspace = true
-# client.workspace = true
-# project.workspace = true
-# settings.workspace = true