mmc: core: Drop unused define

The last user of MMC_OPS_TIMEOUT_MS was recently removed, however the
define stayed around. Let's remove it.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Tested-by: NBaolin Wang <baolin.wang7@gmail.com>
Tested-by: NLudovic Barre <ludovic.barre@st.com>
Reviewed-by: NLudovic Barre <ludovic.barre@st.com>
Link: https://lore.kernel.org/r/20200204085449.32585-3-ulf.hansson@linaro.org

drivers/mmc/core/mmc_ops.c

@@ -19,7 +19,6 @@
 #include "host.h"
 #include "mmc_ops.h"
 
-#define MMC_OPS_TIMEOUT_MS		(10 * 60 * 1000) /* 10min*/
 #define MMC_BKOPS_TIMEOUT_MS		(120 * 1000) /* 120s */
 #define MMC_CACHE_FLUSH_TIMEOUT_MS	(30 * 1000) /* 30s */