Merge branch 'cbegeman/ocn/unmask-submeso-var-maint-2.1' into maint-2…

….1 (PR #5461)

Bugfix for ocean submesoscale feature

Fill value masking of the submesoscale variable normalMLEVelocity
resulted in bad values in vertMLEBolusVelocityTop that affected
timeMonthly_avg_mocStreamvalLatAndDepth. This bugfix removes masking of
normalMLEVelocity.

Fixes #5459 on maint-2.1

[BFB]

components/mpas-ocean/src/Registry.xml

@@ -2923,7 +2923,6 @@
 		/>
 		<var name="normalMLEvelocity" type="real" dimensions="nVertLevels nEdges Time" units="m s^-1"
 			description="Velocity from mixed layer eddies (fox kemper 2011 submesoscale parameterization)"
-			missing_value="FILLVAL" missing_value_mask="edgeMask"
 			packages="submeso"
 		/>
 		<var name="cGMphaseSpeed" type="real" dimensions="nEdges Time" units="m s^-1"