diff --git a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/i_porous_medium.md b/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/i_porous_medium.md
deleted file mode 100644
index d7849410e30e3af70dde2746445407b46f6c9d61..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/i_porous_medium.md
+++ /dev/null
@@ -1,3 +0,0 @@
-The id of the porous medium as an integer between 0 and the number of material
-groups minus one. There must be a corresponding data array 'MaterialIDs' in the
-mesh file.
diff --git a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/a_id.md b/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/a_id.md
deleted file mode 100644
index c1dae9f80b40a7c5ba5eb2fc7fae385bf250a298..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/a_id.md
+++ /dev/null
@@ -1,2 +0,0 @@
-It specifies the material ID of a porous medium. The material IDs of elements
-must be given in the mesh's cell data array "MaterialIDs".
diff --git a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/i_porous_medium.md b/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/i_porous_medium.md
deleted file mode 100644
index bb330dc056ceff8400e948dfb52a53fb0f44252a..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/i_porous_medium.md
+++ /dev/null
@@ -1 +0,0 @@
-A tag for the properties of a porous medium with material ID.
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/t_capillary_pressure.md b/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/t_capillary_pressure.md
deleted file mode 100644
index 19d854870d0c3537197cc8edb349b03503fcbede..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/RichardsComponentTransport/porous_medium/porous_medium/t_capillary_pressure.md
+++ /dev/null
@@ -1 +0,0 @@
-Capillary pressure model.