sci-physics/root: install distributed INSTALL file

PS: workaround with cat created a sandbox violation.

Package-Manager: portage-2.2.25

sci-physics/root/root-6.04.06.ebuild

@@ -421,7 +421,7 @@ cleanup_install() {
 	rm -r etc/root/daemons || die
 	# these should be in PATH
 	mv etc/root/proof/utils/pq2/pq2* usr/bin/ || die
-	rm ${DOC_DIR#/}/{INSTALL,LICENSE} || die
+	rm ${DOC_DIR#/}/INSTALL || die
 	use examples || rm -r ${DOC_DIR#/}/examples || die
 
 	# clean hardcoded sandbox paths
@@ -460,12 +460,6 @@ src_install() {
 
 	# do not copress files used by ROOT's CLI (.credit, .demo, .license)
 	docompress -x "${DOC_DIR}"/{CREDITS,examples/tutorials}
-	# needed for .license command to work
-	cat > "${DOC_DIR}/LICENSE" <<- EOF
-	Please visit
-	https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
-	for the full license test
-	EOF
 }
 
 pkg_postinst() {