Revert "QSPI: call is_mem_ready before trying to set write enable bit"

This reverts commit 3724f42.

Author: facchinm

storage/blockdevice/COMPONENT_QSPIF/source/QSPIFBlockDevice.cpp

@@ -1243,11 +1243,6 @@ int QSPIFBlockDevice::_set_write_enable()
     uint8_t status_value = 0;
     int status = -1;
 
-    if (false == _is_mem_ready()) {
-        tr_error("Device not ready, set_write_enable failed");
-        return -1;
-    }
-
     do {
         if (QSPI_STATUS_OK !=  _qspi_send_general_command(QSPIF_INST_WREN, QSPI_NO_ADDRESS_COMMAND, NULL, 0, NULL, 0)) {
             tr_error("Sending WREN command FAILED");