Remove unused error codes

[skliper]

Is your feature request related to a problem? Please describe.
Unused (shell capability moved to stand-alone app):

cFE/modules/core_api/fsw/inc/cfe_error.h

Lines 350 to 356 in e80aae9

	/**
	* @brief Shell Command Error
	*
	* Error occured ehen trying to pass a system call to the OS shell
	*
	*/
	#define CFE_ES_ERR_SHELL_CMD ((CFE_Status_t)0xc400000c)

Last sender id logic removed, error code no longer used:

cFE/modules/core_api/fsw/inc/cfe_error.h

Lines 828 to 835 in e80aae9

	/**
	* @brief No Message Recieved
	*
	* When trying to determine the last senders ID, this return
	* value indicates that there was not a message recived on the pipe.
	*
	*/
	#define CFE_SB_NO_MSG_RECV ((CFE_Status_t)0xca00000f)

Describe the solution you'd like
Remove

Describe alternatives you've considered
None

Additional context
CFS-40 code review

Requester Info
Jacob Hageman - NASA/GSFC