Fix the proc-macro-srv

Author: bjorn3

src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/rust_analyzer_span.rs

@@ -145,12 +145,14 @@ impl server::Span for RaSpanServer {
         // FIXME
         None
     }
+    #[cfg(bootstrap)]
     fn save_span(&mut self, _span: Self::Span) -> usize {
         // FIXME, quote is incompatible with third-party tools
         // This is called by the quote proc-macro which is expanded when the proc-macro is compiled
         // As such, r-a will never observe this
         0
     }
+    #[cfg(bootstrap)]
     fn recover_proc_macro_span(&mut self, _id: usize) -> Self::Span {
         // FIXME, quote is incompatible with third-party tools
         // This is called by the expansion of quote!, r-a will observe this, but we don't have

src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/token_id.rs

@@ -117,12 +117,15 @@ impl server::Span for TokenIdServer {
     fn local_file(&mut self, _span: Self::Span) -> Option<String> {
         None
     }
+    #[cfg(bootstrap)]
     fn save_span(&mut self, _span: Self::Span) -> usize {
         0
     }
+    #[cfg(bootstrap)]
     fn recover_proc_macro_span(&mut self, _id: usize) -> Self::Span {
         self.call_site
     }
+
     /// Recent feature, not yet in the proc_macro
     ///
     /// See PR: