Revert "feat: emc changes for mixedmode (#857) (#898)" (#914)

This reverts commit 516a5ef.

CMakeLists.txt

@@ -100,8 +100,6 @@ list(APPEND fms_fortran_src_files
   column_diagnostics/column_diagnostics.F90
   constants/constants.F90
   constants/fmsconstants.F90
-  constants4/constants4.F90
-  constants4/fmsconstants4.F90
   coupler/atmos_ocean_fluxes.F90
   coupler/coupler_types.F90
   coupler/ensemble_manager.F90

diag_manager/diag_axis.F90

@@ -113,7 +113,7 @@ MODULE diag_axis_mod
   INTEGER FUNCTION diag_axis_init(name, DATA, units, cart_name, long_name, direction,&
        & set_name, edges, Domain, Domain2, DomainU, aux, req, tile_count, domain_position )
     CHARACTER(len=*), INTENT(in) :: name !< Short name for axis
-    CLASS(*), DIMENSION(:), INTENT(in) :: DATA !< Array of coordinate values
+    REAL, DIMENSION(:), INTENT(in) :: DATA !< Array of coordinate values
     CHARACTER(len=*), INTENT(in) :: units !< Units for the axis
     CHARACTER(len=*), INTENT(in) :: cart_name !< Cartesian axis ("X", "Y", "Z", "T")
     CHARACTER(len=*), INTENT(in), OPTIONAL :: long_name !< Long name for the axis.
@@ -231,15 +231,7 @@ INTEGER FUNCTION diag_axis_init(name, DATA, units, cart_name, long_name, directi
 
     ! Initialize Axes(diag_axis_init)
     Axes(diag_axis_init)%name   = TRIM(name)
-    SELECT TYPE (DATA)
-    TYPE IS (real(kind=r4_kind))
-       Axes(diag_axis_init)%data = DATA(1:axlen)
-    TYPE IS (real(kind=r8_kind))
-       Axes(diag_axis_init)%data = real(DATA(1:axlen))
-    CLASS DEFAULT
-       CALL error_mesg('diag_axis_mod::diag_axis_init',&
-            & 'The axis data is not one of the supported types of real(kind=4) or real(kind=8)', FATAL)
-    END SELECT
+    Axes(diag_axis_init)%data   = DATA(1:axlen)
     Axes(diag_axis_init)%units  = units
     Axes(diag_axis_init)%length = axlen
     Axes(diag_axis_init)%set    = set
@@ -468,7 +460,7 @@ SUBROUTINE get_diag_axis(id, name, units, long_name, cart_name,&
     INTEGER, INTENT(out) :: direction !< Direction of data. (See <TT>@ref diag_axis_init</TT> for a description of
                                       !! allowed values)
     INTEGER, INTENT(out) :: edges !< Axis ID for the previously defined "edges axis".
-    CLASS(*), DIMENSION(:), INTENT(out) :: DATA !< Array of coordinate values for this axis.
+    REAL, DIMENSION(:), INTENT(out) :: DATA !< Array of coordinate values for this axis.
     INTEGER, INTENT(out), OPTIONAL :: num_attributes
     TYPE(diag_atttype), ALLOCATABLE, DIMENSION(:), INTENT(out), OPTIONAL :: attributes
     INTEGER, INTENT(out), OPTIONAL :: domain_position
@@ -489,15 +481,7 @@ SUBROUTINE get_diag_axis(id, name, units, long_name, cart_name,&
        ! <ERROR STATUS="FATAL">array data is too small.</ERROR>
        CALL error_mesg('diag_axis_mod::get_diag_axis', 'array data is too small', FATAL)
     ELSE
-       SELECT TYPE (DATA)
-       TYPE IS (real(kind=r4_kind))
-          DATA(1:Axes(id)%length) = real(Axes(id)%data(1:Axes(id)%length), kind=r4_kind)
-       TYPE IS (real(kind=r8_kind))
-          DATA(1:Axes(id)%length) = Axes(id)%data(1:Axes(id)%length)
-       CLASS DEFAULT
-          CALL error_mesg('diag_axis_mod::get_diag_axis',&
-               & 'The axis data is not one of the supported types of real(kind=4) or real(kind=8)', FATAL)
-       END SELECT
+       DATA(1:Axes(id)%length) = Axes(id)%data(1:Axes(id)%length)
     END IF
     IF ( PRESENT(num_attributes) ) THEN
        num_attributes = Axes(id)%num_attributes