Fix initialize description in memory pool ops

Author: KFilipek

include/umf/memory_pool_ops.h

@@ -36,9 +36,8 @@ typedef struct umf_memory_pool_ops_t {
 
     ///
     /// @brief Initializes memory pool.
-    /// @param providers array of memory providers that will be used for coarse-grain allocations.
+    /// @param provider memory provider that will be used for coarse-grain allocations.
     ///        Should contain at least one memory provider.
-    /// @param numProvider number of elements in the providers array
     /// @param params pool-specific params, or NULL for defaults
     /// @param pool [out] returns pointer to the pool
     /// @return UMF_RESULT_SUCCESS on success or appropriate error code on failure.