Remove unused iface params

[talassio]

Consider removing the following unused parameters:

src/ral_nlls_workspaces.f90, line  998: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1109: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1316: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1346: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1491: Unused dummy variable M
src/ral_nlls_workspaces.f90, line 1567: Unused dummy variable M
src/ral_nlls_workspaces.f90, line 1585: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1602: Unused dummy variable M
src/ral_nlls_workspaces.f90, line 1614: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1673: Unused dummy variable M
src/ral_nlls_workspaces.f90, line 1685: Unused dummy variable OPTIONS
src/ral_nlls_workspaces.f90, line 1733: Unused dummy variable M
src/ral_nlls_workspaces.f90, line 1743: Unused dummy variable OPTIONS
src/ral_nlls_internal.f90,   line 1507: Unused dummy variable USE_SECOND_DERIVATIVES
src/ral_nlls_internal.f90,   line 1718: Unused dummy variable HF
src/ral_nlls_internal.f90,   line 2128: Unused dummy variable M
src/ral_nlls_internal.f90,   line 2464: Unused dummy variable M
src/ral_nlls_internal.f90,   line 2576: Unused dummy variable APLUSSIGMA
src/ral_nlls_internal.f90,   line 2709: Unused dummy variable M
src/ral_nlls_internal.f90,   line 2709: Unused dummy variable NUM_SUCCESSFUL_STEPS
src/ral_nlls_internal.f90,   line 2752: Unused dummy variable M
src/ral_nlls_internal.f90,   line 2752: Unused dummy variable NUM_SUCCESSFUL_STEPS
src/ral_nlls_internal.f90,   line 2752: Unused dummy variable OPTIONS
src/ral_nlls_internal.f90,   line 3097: Unused dummy variable OPTIONS
src/ral_nlls_internal.f90,   line 3660: Unused dummy variable OPTIONS
src/ral_nlls_internal.f90,   line 3847: Unused dummy variable NUM_SUCCESSFUL_STEPS
src/ral_nlls_internal.f90,   line 3913: Unused dummy variable M
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable ALPN
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable DIR
src/ral_nlls_internal.f90,   line 4500: Unused dummy procedure EVAL_F
src/ral_nlls_internal.f90,   line 4500: Unused dummy procedure EVAL_J
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable FDX
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable FNEW
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable NORMF
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable NORMFNEW
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable NORMJFNEW
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable NORMX
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable OPTIONS
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable PARAMS
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable SX
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable W
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable WEIGHTS
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable X
src/ral_nlls_internal.f90,   line 4500: Unused dummy variable XNEW

src/ral_nlls_internal.f90,   line 4500: INTENT(OUT) dummy argument FNEW never set
src/ral_nlls_internal.f90,   line 4500: INTENT(OUT) dummy argument NORMFNEW never set
src/ral_nlls_internal.f90,   line 4500: INTENT(OUT) dummy argument NORMJFNEW never set
src/ral_nlls_internal.f90,   line 4500: INTENT(OUT) dummy argument NORMX never set
src/ral_nlls_internal.f90,   line 4500: INTENT(OUT) dummy argument XNEW never set