Avoid websocket base64 import clash

ober

dee528b785261c3301e716b68ab3a9e9637f883d

diff --git a/lib/std/net/websocket.ss b/lib/std/net/websocket.ss
index bf10db7..0dc1029 100644
--- a/lib/std/net/websocket.ss
+++ b/lib/std/net/websocket.ss
@@ -23,7 +23,7 @@
     ;; Limits
     *ws-max-payload-size*)
 
-  (import (chezscheme)
+  (import (except (chezscheme) base64-encode base64-decode)
           (std crypto native-rust)
           (std text base64)
           (only (jerboa core) def defstruct))