Revert "add runner_command function"

This reverts commit 8485e94.

Author: perazz

src/fpm_command_line.f90

@@ -91,8 +91,6 @@ module fpm_command_line
     character(len=:),allocatable :: args
     character(len=:),allocatable :: runner
     logical :: example
-    contains
-       procedure :: runner_command
 end type
 
 type, extends(fpm_run_settings)  :: fpm_test_settings
@@ -1432,21 +1430,4 @@ function get_fpm_env(env, default) result(val)
       val = get_env(fpm_prefix//env, default)
     end function get_fpm_env
 
-    !> Build a full runner command (executable + command-line arguments)
-    function runner_command(cmd) result(run_cmd)
-        class(fpm_run_settings), intent(in) :: cmd
-        character(len=:), allocatable :: run_cmd
-
-        !> Get executable
-        if (len_trim(cmd%runner)>0) then
-            run_cmd = trim(cmd%runner)
-        else
-            run_cmd = ''
-        end if
-
-        !> Append command-line arguments
-        if (len_trim(cmd%runner_args)>0) run_cmd = run_cmd//' '//trim(cmd%runner_args)
-
-    end function runner_command
-
 end module fpm_command_line