omit unnecessary XSRETURN_EMPTY

src/http/modules/perl/nginx.xs

diff --git a/src/http/modules/perl/nginx.xs b/src/http/modules/perl/nginx.xs
index f9355b6..7423daa 100644
--- a/src/http/modules/perl/nginx.xs
+++ b/src/http/modules/perl/nginx.xs
@@ -472,8 +472,6 @@
         r->headers_out.content_length = header;
     }
 
-    XSRETURN_EMPTY;
-
 
 void
 filename(r)
@@ -600,8 +598,6 @@
 
     (void) ngx_http_perl_output(r, b);
 
-    XSRETURN_EMPTY;
-
 
 void
 sendfile(r, filename, offset = -1, bytes = 0)
@@ -688,8 +684,6 @@
 
     (void) ngx_http_perl_output(r, b);
 
-    XSRETURN_EMPTY;
-
 
 void
 flush(r)
@@ -755,8 +749,6 @@
 
     r->allow_ranges = 1;
 
-    XSRETURN_EMPTY;
-
 
 void
 unescape(r, text, type = 0)
@@ -953,8 +945,6 @@
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                    "perl sleep: %d", ctx->sleep);
 
-    XSRETURN_EMPTY;
-
 
 void
 log_error(r, err, msg)
@@ -985,5 +975,3 @@
     p = (u_char *) SvPV(msg, len);
 
     ngx_log_error(NGX_LOG_ERR, r->connection->log, e, "perl: %s", p);
-
-    XSRETURN_EMPTY;