Revert "cache/dynacache: Prevent multiple concurrent resizes"

This reverts commit 564bae0.

Thinking about it, the above doesn't make any sense/having any effect.

cache/dynacache/dynacache.go

@@ -119,8 +119,7 @@ func (o OptionsPartition) CalculateMaxSize(maxSizePerPartition int) int {
 
 // A dynamic partitioned cache.
 type Cache struct {
-	mu       sync.RWMutex
-	resizeMu sync.Mutex
+	mu sync.RWMutex
 
 	partitions map[string]PartitionManager
 
@@ -232,12 +231,6 @@ func (c *Cache) Stop() {
 }
 
 func (c *Cache) adjustCurrentMaxSize() {
-	if !c.resizeMu.TryLock() {
-		// Prevent multiple concurrent resizes.
-		return
-	}
-	defer c.resizeMu.Unlock()
-
 	c.mu.RLock()
 	defer c.mu.RUnlock()