Minimise use

src/gpl_module.f90

 
 MODULE gpl_module
   use globals
-  use utils
-  use maths_functions
-  use shuffle
-  use mpl_module
   use ieps
+  use utils
+  use shuffle, only: shuffle_product, shuffle_with_zero
+  use maths_functions, only: plog1, polylog, zeta
+  use mpl_module, only: mpl
   implicit none
 
   INTERFACE G

src/maths_functions.f90

 
 MODULE maths_functions
   use globals
-  use utils
+  use ieps
+  use utils, only: factorial
   implicit none
   interface polylog
     module procedure polylog1, polylog2

src/mpl_module.f90

  
 MODULE mpl_module
   use globals
-  use utils
-  use maths_functions
+  use ieps
   implicit none
 
 CONTAINS 

src/shuffle.f90

 
 MODULE shuffle
   use globals
-  use utils
+  use ieps
   implicit none
 
 CONTAINS