RTOS api - osThreadGetState removal

[0xc0170]

osThreadGetState() should be removed as it's our own extension, identical almost to Cortex-A and Cortex-M. This is valid for RTX v4.7x. The new RTX will contain this function, as I have noticed in the cmsis_5 repository.

More information: #1731

[0xc0170]

cc @neilt6 @TomoYamanaka

[ciarmcom]

ARM Internal Ref: IOTMORF-183

[TomoYamanaka]

@0xc0170

Sorry for this late reply.
I agree that you mentioned.

[0xc0170]

Once we get rtx2 in, this can be closed.

[deepikabhavnani]

@0xc0170 - RTX2 is in. This can be closed?