Remove shr modules from the tools directory

We have some shr modules copied to the tools directory:

```
./mkprocdata_map/src/shr_file_mod.F90
./mkprocdata_map/src/shr_kind_mod.F90
./mksurfdata_map/src/shr_const_mod.F90
./mksurfdata_map/src/shr_file_mod.F90
./mksurfdata_map/src/shr_log_mod.F90
./mksurfdata_map/src/shr_sys_mod.F90
./mksurfdata_map/src/shr_timer_mod.F90
./mksurfdata_map/src/shr_kind_mod.F90
./mksurfdata_map/src/shr_string_mod.F90
```

This can be confusing for someone looking for the definition of one of these shr modules - e.g., where shr_const_mod is defined. If I remember correctly, this is a holdover from a point when there was a desire to have the CLM tools directory be a standalone thing that could be checked out & built on its own. I don't think we need that anymore, and we can assume that someone building the tools has all of the CTSM externals checked out first.