misc: Remove decrepit folders

Author: EdCaunt

.github/azure/startVM.ps1

@@ -25,9 +25,7 @@ pinned to specific CPU cores, to get reliable and deterministic results. There
 are several ways to achieve this:
 
 * Through environment variables. All MPI/OpenMP distributions provide a set of
-  environment variables to control process/thread pinning.  Devito also
-  supplies the `set_omp_pinning.sh` program (under `/scripts`), which helps
-  with thread pinning (though, currently, only limited to Intel architectures).
+  environment variables to control process/thread pinning.
 * Through a program such as `numactl` or `taskset`.
 
 If running on a NUMA system, where multiple nodes of CPU cores ("sockets") and
@@ -46,7 +44,7 @@ working set). There are multiple scenarios that are worth considering:
   logical cores are created. This can be changed by setting the OpenMP-standard
   `OMP_NUM_THREADS` environment variable to a different value. When might we
   want to do this?
-  - Unless on a hyperthreads-centerd system, such as an Intel Knights Landing,
+  - Unless on a hyperthreads-centered system, such as an Intel Knights Landing,
     spawning only as many threads as *physical* cores usually results in
     slightly better performance due to less contention for hardware resources.
   - Since, here, we are merely interested in benchmarking, when running on a