Remove some dead code in bssl_shim

Change-Id: I752be9b328cd6a444029f6640a2d7feca0e00206
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/75307
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: Bob Beck <bbe@google.com>

ssl/test/bssl_shim.cc

diff --git a/ssl/test/bssl_shim.cc b/ssl/test/bssl_shim.cc
index 414b4be..78ecc68 100644
--- a/ssl/test/bssl_shim.cc
+++ b/ssl/test/bssl_shim.cc
@@ -154,11 +154,6 @@
   return 1;
 }
 
-template <typename T>
-struct Free {
-  void operator()(T *buf) { free(buf); }
-};
-
 // Connect returns a new socket connected to the runner, or -1 on error.
 static OwnedSocket Connect(const TestConfig *config) {
   sockaddr_storage addr;