Turn off reducedgrid in the EnKF (NOAA-EMC#2456)

The reducedgrid feature no longer results in reduced runtime for the
current EnKF configuration. This feature also cannot be used in soil DA
due to masked fields. It will be set to .false. by default.

Resolves NOAA-EMC#2455

scripts/exgdas_enkf_update.sh

@@ -69,7 +69,7 @@ corrlength=${corrlength:-1250}
 lnsigcutoff=${lnsigcutoff:-2.5}
 analpertwt=${analpertwt:-0.85}
 readin_localization_enkf=${readin_localization_enkf:-".true."}
-reducedgrid=${reducedgrid:-".true."}
+reducedgrid=${reducedgrid:-".false."}
 letkf_flag=${letkf_flag:-".false."}
 getkf=${getkf:-".false."}
 denkf=${denkf:-".false."}