Remove local_time from ActiveTextLogger

[timcanham]

F´ Version
Affected Component

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Problem Description

ActiveTextLogger makes a Posix system call to convert time to a local workstation time.

This code should be removed so it can be run on non-posix platforms:

https://github.com/nasa/fprime/blob/devel/Svc/ActiveTextLogger/ActiveTextLogger.cpp#L84

Expected Behavior

ActiveTextLogger should just print the seconds/subseconds field.