UT fails to build if C library does not provide INTMAX_MAX

[jphickey]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
Non-compliant C libraries might not provide the INTMAX_MAX value. This is the case on VxWorks 6.9 and therefore the Any_int_GreaterThan() function fails to compile.

To Reproduce
Cross compile, with coverage tests, on VxWorks 6.9. Error is reported:

apps/cf/unit-test/utilities/cf_test_utils.c: In function 'Any_int_GreaterThan':
apps/cf/unit-test/utilities/cf_test_utils.c:458: error: 'INTMAX_MAX' undeclared (first use in this function)

Expected behavior
Build should succeed

System observed on:
VxWorks 6.9

Additional context
This function appears to not actually be used, so may be able to just remove it.

Reporter Info
Joseph Hickey, Vantage Systems, Inc.