language_model: Remove use_any_tool method from LanguageModel (#27930)

This PR removes the `use_any_tool` method from the `LanguageModel`
trait.

It was not being used anywhere, and doesn't really fit in our new tool
use story.

Release Notes:

- N/A

crates/language_models/src/provider/anthropic.rs

@@ -6,7 +6,7 @@ use collections::{BTreeMap, HashMap};
 use credentials_provider::CredentialsProvider;
 use editor::{Editor, EditorElement, EditorStyle};
 use futures::Stream;
-use futures::{FutureExt, StreamExt, TryStreamExt as _, future::BoxFuture, stream::BoxStream};
+use futures::{FutureExt, StreamExt, future::BoxFuture, stream::BoxStream};
 use gpui::{
     AnyView, App, AsyncApp, Context, Entity, FontStyle, Subscription, Task, TextStyle, WhiteSpace,
 };
@@ -457,44 +457,6 @@ impl LanguageModel for AnthropicModel {
                 min_total_token: config.min_total_token,
             })
     }
-
-    fn use_any_tool(
-        &self,
-        request: LanguageModelRequest,
-        tool_name: String,
-        tool_description: String,
-        input_schema: serde_json::Value,
-        cx: &AsyncApp,
-    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<String>>>> {
-        let mut request = into_anthropic(
-            request,
-            self.model.tool_model_id().into(),
-            self.model.default_temperature(),
-            self.model.max_output_tokens(),
-            self.model.mode(),
-        );
-        request.tool_choice = Some(anthropic::ToolChoice::Tool {
-            name: tool_name.clone(),
-        });
-        request.tools = vec![anthropic::Tool {
-            name: tool_name.clone(),
-            description: tool_description,
-            input_schema,
-        }];
-
-        let response = self.stream_completion(request, cx);
-        self.request_limiter
-            .run(async move {
-                let response = response.await?;
-                Ok(anthropic::extract_tool_args_from_events(
-                    tool_name,
-                    Box::pin(response.map_err(|e| anyhow!(e))),
-                )
-                .await?
-                .boxed())
-            })
-            .boxed()
-    }
 }
 
 pub fn into_anthropic(