delete useless r->cache->uses

src/http/ngx_http_cache.h

diff --git a/src/http/ngx_http_cache.h b/src/http/ngx_http_cache.h
index 697c4d4..ed5ec24 100644
--- a/src/http/ngx_http_cache.h
+++ b/src/http/ngx_http_cache.h
@@ -62,7 +62,6 @@
     off_t                            length;
 
     ngx_uint_t                       min_uses;
-    ngx_uint_t                       uses;
     ngx_uint_t                       error;
     ngx_uint_t                       valid_msec;
 

src/http/ngx_http_file_cache.c

diff --git a/src/http/ngx_http_file_cache.c b/src/http/ngx_http_file_cache.c
index 0893c15..8c944ae 100644
--- a/src/http/ngx_http_file_cache.c
+++ b/src/http/ngx_http_file_cache.c
@@ -172,9 +172,8 @@
 
     rc = ngx_http_file_cache_exists(cache, c);
 
-    ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http file cache exists: %i u:%ui e:%d",
-                   rc, c->uses, c->exists);
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http file cache exists: %i e:%d", rc, c->exists);
 
     if (rc == NGX_ERROR) {
         return rc;
@@ -332,8 +331,6 @@
 
     if (c->valid_sec < now) {
 
-        c->uses = c->min_uses;
-
         ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                        "http file cache expired: %T %T", c->valid_sec, now);
 
@@ -440,7 +437,6 @@
     ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
 
     c->uniq = fcn->uniq;
-    c->uses = fcn->uses;
     c->error = fcn->error;
     c->node = fcn;
 

src/http/ngx_http_upstream.c

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 1d9ccb8..f360e84 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -577,8 +577,8 @@
 
     rc = ngx_http_file_cache_open(r);
 
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http upstream cache: %i u:%ui", rc, c->uses);
+    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http upstream cache: %i", rc);
 
     if (rc == NGX_OK) {