diff --git a/.gitignore b/.gitignore
index 5b49c58..a954328 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,2 @@
 # KiCAD module backups
 /modules/*/*-backups/
-
-# KiCAD lock files
-~*.lck
diff --git a/modules/ph00524/README.md b/modules/ph00524/README.md
deleted file mode 100644
index 6ed5f46..0000000
--- a/modules/ph00524/README.md
+++ /dev/null
@@ -1,14 +0,0 @@
-## Board `PH00524-2`
-
-The board controlling the vacuum valves does not show up in the schematics
-delivered with the SEM.  To us, it seems like the functionality was updated by
-merging a few of the boards from the schematics into a single board with even
-more smartness.
-
-`PH00524-2` contains connectors named `FK*`, `FM*`, and `FL*`, leading to the
-assumption that the boards `FK`, `FM`, and `FL` have been integrated into it.
-So far, the connectors seem to match up with the ones shown in the SEM schematics.
-
-There is also a Z80 based system + an EEPROM on the board.
-
-![Image of PH00524-2](./ph00524-2.jpg)
diff --git a/modules/ph00524/ph00524-2.jpg b/modules/ph00524/ph00524-2.jpg
deleted file mode 100644
index d7879b5..0000000
--- a/modules/ph00524/ph00524-2.jpg
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:18add0a03d549b76f34314790ebeacd9da1810961a95e05aa610694e8955a35d
-size 466557