remove missing PSC internships (#1447)

* remove missing PSC internships

These pages are now 404 on the PSC site.

* remove missing Tufts job

_data/internships.yml

@@ -3,21 +3,6 @@
   name: Associate in Research Software Engineering - Temporary
   posted: 2024-02-14
   url: https://main-princeton.icims.com/jobs/18493/associate-in-research-software-engineering---temporary/job
-- expires: 2024-03-15
-  location: Pittsburgh Supercomputing Center, Pittsburgh, PA
-  name: Anton Data Portal Internship
-  posted: 2024-02-01
-  url: https://www.psc.edu/anton-data-portal-internship/
-- expires: 2024-03-15
-  location: Pittsburgh Supercomputing Center, Pittsburgh, PA
-  name: Molecular Dynamics Internship
-  posted: 2024-02-01
-  url: https://www.psc.edu/molecular-dynamics-internship/
-- expires: 2024-03-15
-  location: Pittsburgh Supercomputing Center, Pittsburgh, PA
-  name: Software Packaging Internship
-  posted: 2024-02-01
-  url: https://www.psc.edu/software-packaging-internship/
 - expires: 2024-03-08
   location: Pittsburgh Supercomputing Center, Pittsburgh, PA
   name: Brain Image Library Student Research Programmer

_data/related-jobs.yml

@@ -3,11 +3,6 @@
   name: Assistant Professor, Teaching Track, in Software Development and Design
   posted: 2024-02-12
   url: https://apply.interfolio.com/140131
-- expires: 2024-04-07
-  location: Tufts University, Remote
-  name: HPC Systems Engineer
-  posted: 2024-02-07
-  url: https://jobs.tufts.edu/jobs/20073?lang=en-us
 - expires: 2024-03-02
   location: BioTeam, Inc., Remote
   name: Senior HPC Consultant, Life Sciences