Remove FATES_ERROR_EL from the FatesColdST3 testmod

[glemieux]

Per NGEET/fates#1155 update, FATES_ERROR_EL does not have relevance to this test. FATES has been updated to remove this from the history output during this run mode and as such, will fail during RUN if this variable is included in the user_nl_clm history output.

[glemieux]

This is address for the FatesColdST3 test via ebf5f26.

[glemieux]

This is address for the FatesColdST3 test via ebf5f26.

Actually this doesn't address the issue given #2867 (comment).

The short term fix here is to clear the tapes and re-add the Fates testmod base variables to the FatesColdST3 user_nl_clm file, leaving the FATES_ERROR_EL out.

[glemieux]

Reopening this as my attempted fix in #2782 didn't really work.