diff --git a/b/Boost/Boost-1.59.0-intel-2015b-Python-2.7.11 b/b/Boost/Boost-1.59.0-intel-2015b-Python-2.7.11
deleted file mode 100644
index e69de29b..00000000
diff --git a/b/Boost/Boost-1.60.0-foss-2015g-Python-2.7.9 b/b/Boost/Boost-1.60.0-foss-2015g-Python-2.7.9
deleted file mode 100644
index e69de29b..00000000
diff --git a/c/CNTK/a.out b/c/CNTK/a.out
deleted file mode 100644
index e69de29b..00000000
diff --git a/d/dotNET-Core-SDK/core.12072 b/d/dotNET-Core-SDK/core.12072
deleted file mode 100644
index d53b758f..00000000
Binary files a/d/dotNET-Core-SDK/core.12072 and /dev/null differ
diff --git a/l/libpng/file.err b/l/libpng/file.err
deleted file mode 100644
index 588c65e9..00000000
--- a/l/libpng/file.err
+++ /dev/null
@@ -1 +0,0 @@
-/COM,ANSYS RELEASE Release 19.0      BUILD 19.0      UP20171214       14:17:35
diff --git a/n/numpy/.cache/v/cache/lastfailed b/n/numpy/.cache/v/cache/lastfailed
deleted file mode 100644
index 9e26dfee..00000000
--- a/n/numpy/.cache/v/cache/lastfailed
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file
diff --git a/o/OpenMPI/OpenMPI-1.10.7-PGI-18.5-GCC-6.3.0-2.27.env b/o/OpenMPI/OpenMPI-1.10.7-PGI-18.5-GCC-6.3.0-2.27.env
deleted file mode 100644
index fafecf5d..00000000
--- a/o/OpenMPI/OpenMPI-1.10.7-PGI-18.5-GCC-6.3.0-2.27.env
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/bash
-# script to set up build environment as defined by EasyBuild v3.6.2 for OpenMPI-1.10.7-PGI-18.5-GCC-6.3.0-2.27.eb
-# usage: source OpenMPI-1.10.7-PGI-18.5-GCC-6.3.0-2.27.env
-
-# toolchain & dependency modules
-module load PGI/18.5-GCC-6.3.0-2.27
-module load hwloc/1.11.7-PGI-18.5-GCC-6.3.0-2.27
-module load Java/1.9.0+181
-
-# build environment
-export CC='pgcc'
-export CPPFLAGS='-I/apps/all/hwloc/1.11.7-PGI-18.5-GCC-6.3.0-2.27/include -I/apps/all/Java/1.9.0+181/include'
-export CXX='pgc++'
-export F77='pgf77'
-export F90='pgfortran'
-export FC='pgfortran'
-export LDFLAGS='-L/apps/all/hwloc/1.11.7-PGI-18.5-GCC-6.3.0-2.27/lib -L/apps/all/Java/1.9.0+181/lib'
-export OPTFLAGS='-O3'
-export LIBS="-ldl"
diff --git a/p/Python/.cache/v/cache/lastfailed b/p/Python/.cache/v/cache/lastfailed
deleted file mode 100644
index a5f09be4..00000000
--- a/p/Python/.cache/v/cache/lastfailed
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "scipy/special/tests/test_data.py::test_boost[<Data for legendre_p_via_assoc_: legendre_p_large_ipp-legendre_p_large>]": true, 
-  "scipy/special/tests/test_data.py::test_boost[<Data for legendre_p_via_lpmn: legendre_p_large_ipp-legendre_p_large>]": true
-}
\ No newline at end of file