Remove `prompt-caching-2024-07-31` beta header for Anthropic AI (#43185)

Andrew Farkas and Cole Miller created 

Closes #42715

Release Notes:

- Remove `prompt-caching-2024-07-31` beta header for Anthropic AI

Co-authored-by: Cole Miller <cole@zed.dev>

Change summary

crates/anthropic/src/anthropic.rs | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)

Detailed changes

crates/anthropic/src/anthropic.rs 🔗 

@@ -393,13 +393,8 @@ impl Model {
         }
     }
 
-    pub const DEFAULT_BETA_HEADERS: &[&str] = &["prompt-caching-2024-07-31"];
-
     pub fn beta_headers(&self) -> String {
-        let mut headers = Self::DEFAULT_BETA_HEADERS
-            .iter()
-            .map(|header| header.to_string())
-            .collect::<Vec<_>>();
+        let mut headers = vec![];
 
         match self {
             Self::Claude3_7Sonnet | Self::Claude3_7SonnetThinking => {