diff --git a/deps/libz/deflate.c b/deps/libz/deflate.c
index b9991f5436..6fc862e5a7 100644
--- a/deps/libz/deflate.c
+++ b/deps/libz/deflate.c
@@ -1323,11 +1323,6 @@ static void check_match(s, start, match, length)
       do {
          fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
       } while (--length != 0);
-      z_error("invalid match");
-   }
-   if (z_verbose > 1) {
-      fprintf(stderr,"\\[%d,%d]", start-match, length);
-      do { putc(s->window[start++], stderr); } while (--length != 0);
    }
 }
 #else
diff --git a/deps/libz/trees.c b/deps/libz/trees.c
index ed5ff6ab41..8b5e857f85 100644
--- a/deps/libz/trees.c
+++ b/deps/libz/trees.c
@@ -164,9 +164,7 @@ static void gen_trees_header (void);
 /* Send a code of the given tree. c and tree must not have side effects */
 
 #else /* DEBUG */
-#  define send_code(s, c, tree) \
-{ if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
-   send_bits(s, tree[c].Code, tree[c].Len); }
+#  define send_code(s, c, tree) { send_bits(s, tree[c].Code, tree[c].Len); }
 #endif
 
 /* ===========================================================================