Simplify installation of OCaml header (.h) files

The tools/cleanup-header script has no effect any more, so stop
calling it during make install and remove it from the repository.

.gitattributes

@@ -105,7 +105,6 @@ stdlib/Compflags text eol=lf
 stdlib/sharpbang text eol=lf
 tools/check-typo text eol=lf
 tools/ci-build text eol=lf
-tools/cleanup-header text eol=lf
 tools/msvs-promote-path text eol=lf
 tools/gdb-macros text eol=lf
 tools/magic text eol=lf

byterun/Makefile

@@ -17,6 +17,7 @@ include ../config/Makefile
 
 INSTALL_BINDIR=$(DESTDIR)$(BINDIR)
 INSTALL_LIBDIR=$(DESTDIR)$(LIBDIR)
+INSTALL_INCDIR=$(INSTALL_LIBDIR)/caml
 
 # The PROGRAMS (resp. LIBRARIES) variable list the files to build and
 # install as programs in $(INSTALL_BINDIR) (resp. libraries in
@@ -105,11 +106,8 @@ ld.conf: ../config/Makefile
 install:
 	cp $(PROGRAMS) "$(INSTALL_BINDIR)"
 	cp $(LIBRARIES) "$(INSTALL_LIBDIR)"
-	mkdir -p "$(INSTALL_LIBDIR)/caml"
-	for i in caml/*.h; do \
-	  sed -f ../tools/cleanup-header $$i \
-	      > "$(INSTALL_LIBDIR)/$$i"; \
-	done
+	mkdir -p "$(INSTALL_INCDIR)"
+	cp caml/*.h "$(INSTALL_INCDIR)"
 
 # If primitives contain duplicated lines (e.g. because the code is defined
 # like