diff --git a/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.comp b/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.comp
deleted file mode 100644
index 82024426e95..00000000000
--- a/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/braibant/ocaml/archive/expose_caml_make_float_vect.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.descr b/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.descr
deleted file mode 100644
index 010a1bbff6e..00000000000
--- a/compilers/4.04.0/4.04.0+pr534/4.04.0+pr534.descr
+++ /dev/null
@@ -1 +0,0 @@
-Fix MPR#7203: expose a convenience function to allocate float vect
\ No newline at end of file
diff --git a/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.comp b/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.comp
deleted file mode 100644
index 504f0c0f56c..00000000000
--- a/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/OlivierNicole/ocaml/archive/efficient-record-update.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.descr b/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.descr
deleted file mode 100644
index d108c42f0bd..00000000000
--- a/compilers/4.04.0/4.04.0+pr538/4.04.0+pr538.descr
+++ /dev/null
@@ -1 +0,0 @@
-PR#6217 Improve perf. of functional record update
\ No newline at end of file
diff --git a/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.comp b/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.comp
deleted file mode 100644
index eb690452b06..00000000000
--- a/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/yallop/ocaml/archive/ocamlyacc-conflict-error.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.descr b/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.descr
deleted file mode 100644
index cd49a8598a4..00000000000
--- a/compilers/4.04.0/4.04.0+pr598/4.04.0+pr598.descr
+++ /dev/null
@@ -1 +0,0 @@
-Reject conflicts in parsing/parser.mly
\ No newline at end of file
diff --git a/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.comp b/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.comp
deleted file mode 100644
index 8dfb87bee56..00000000000
--- a/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/jhjourdan/ocaml/archive/generational_roots_bug.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.descr b/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.descr
deleted file mode 100644
index 23aebeadf86..00000000000
--- a/compilers/4.04.0/4.04.0+pr607/4.04.0+pr607.descr
+++ /dev/null
@@ -1 +0,0 @@
-Bug in generational global roots
\ No newline at end of file
diff --git a/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.comp b/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.comp
deleted file mode 100644
index b0cfd465077..00000000000
--- a/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/Octachron/ocaml/archive/ocamldoc_tested_open.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.descr b/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.descr
deleted file mode 100644
index 3bf33dce7bf..00000000000
--- a/compilers/4.04.0/4.04.0+pr621/4.04.0+pr621.descr
+++ /dev/null
@@ -1 +0,0 @@
-Ocamldoc: test and consistency fix for "-open" option
\ No newline at end of file
diff --git a/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.comp b/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.comp
deleted file mode 100644
index 9673e4c4dbe..00000000000
--- a/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.comp
+++ /dev/null
@@ -1,11 +0,0 @@
-opam-version: "1"
-version: "4.04.0"
-src: "https://github.com/drbo/ocaml/archive/fix-array-bounds-error.tar.gz"
-build: [
-  ["./configure" "-prefix" prefix "-with-debug-runtime"]
-  [make "world"]
-  [make "world.opt"]
-  [make "install"]
-]
-packages: [ "base-unix" "base-bigarray" "base-threads" ]
-env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
diff --git a/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.descr b/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.descr
deleted file mode 100644
index f6e65d1272f..00000000000
--- a/compilers/4.04.0/4.04.0+pr631/4.04.0+pr631.descr
+++ /dev/null
@@ -1 +0,0 @@
-Fix testsuite failure with GCC 6.0 due to -Warray-bounds
\ No newline at end of file