conhost: Remove no longer needed non-blocking IOCTL_CONDRV_READ_INPUT.

dlls/kernelbase/console.c

@@ -1373,8 +1373,7 @@ BOOL WINAPI ReadConsoleInputA( HANDLE handle, INPUT_RECORD *buffer, DWORD length
  */
 BOOL WINAPI ReadConsoleInputW( HANDLE handle, INPUT_RECORD *buffer, DWORD length, DWORD *count )
 {
-    int blocking = 1;
-    if (!console_ioctl( handle, IOCTL_CONDRV_READ_INPUT, &blocking, sizeof(blocking),
+    if (!console_ioctl( handle, IOCTL_CONDRV_READ_INPUT, NULL, 0,
                         buffer, length * sizeof(*buffer), count ))
         return FALSE;
     *count /= sizeof(*buffer);

programs/conhost/conhost.c

@@ -2358,11 +2358,9 @@ static NTSTATUS console_input_ioctl( struct console *console, unsigned int code,
 
     case IOCTL_CONDRV_READ_INPUT:
         {
-            unsigned int blocking;
-            if (in_size && in_size != sizeof(blocking)) return STATUS_INVALID_PARAMETER;
+            if (in_size) return STATUS_INVALID_PARAMETER;
             ensure_tty_input_thread( console );
-            blocking = in_size && *(unsigned int *)in_data;
-            if (blocking && !console->record_count && *out_size)
+            if (!console->record_count && *out_size)
             {
                 TRACE( "pending read\n" );
                 console->read_ioctl = IOCTL_CONDRV_READ_INPUT;