drop outdated file

r-ver/Makefile

-LATEST=3.5.1
-## Also update this in default Dockerfile on new version release!!
-
-latest:
-	docker build --build-arg R_VERSION=${LATEST} -t rocker/r-ver .
-
-## Auto-generate separate Dockerfiles for auto builds by hub
-sync: devel/Dockerfile ${LATEST}/Dockerfile
-
-
-3.5.1/Dockerfile: Dockerfile
-	export R_VERSION=${LATEST} && unset BUILD_DATE && make update
-
-3.5.0/Dockerfile: Dockerfile
-	export R_VERSION=3.5.0 && export BUILD_DATE=2018-07-02 && make update
-
-
-3.4.4/Dockerfile: Dockerfile
-	export R_VERSION=3.4.4 && export BUILD_DATE=2018-04-23 && make update
-
-3.4.3/Dockerfile: Dockerfile
-	export R_VERSION=3.4.3 && export BUILD_DATE=2018-03-15 && make update
-
-3.4.2/Dockerfile: Dockerfile
-	export R_VERSION=3.4.2 && export BUILD_DATE=2017-11-30 && make update
-
-3.4.1/Dockerfile: Dockerfile
-	export R_VERSION=3.4.1 && export BUILD_DATE=2017-09-28 && make update
-
-3.4.0/Dockerfile: Dockerfile
-	export R_VERSION=3.4.0 && export BUILD_DATE=2017-06-30 && make update
-
-
-## Custom configuration for devel
-
-devel/Dockerfile: Dockerfile
-	cp Dockerfile devel/Dockerfile
-	sed -i 's/tcl8\.6-dev/subversion tcl8.6-dev/' devel/Dockerfile
-	sed -i 's/curl -O .*\.gz/svn co https:\/\/svn\.r-project.org\/R\/trunk R-devel/' devel/Dockerfile
-	sed -i 's/.*tar -xf R-.*//' devel/Dockerfile
-	sed -i 's/cd R-.*/cd R-devel \\/' devel/Dockerfile
-
-
-
-####### These are frozen now to debian:jessie images and should not be updated further!
-
-3.3.3/Dockerfile: Dockerfile
-	export R_VERSION=3.3.3 && export BUILD_DATE=2017-04-21 && make update
-3.3.2/Dockerfile: Dockerfile
-	export R_VERSION=3.3.2 && export BUILD_DATE=2017-03-06 && make update
-3.3.1/Dockerfile: Dockerfile
-	export R_VERSION=3.3.1 && export BUILD_DATE=2016-10-31 && make update
-3.3.0/Dockerfile: Dockerfile
-	export R_VERSION=3.3.0 && export BUILD_DATE=2016-06-21 && make update
-## NOTE: This uses Build Date of the last day of version 3.2.0, e.g. day 3.2.1 was released
-3.2.0/Dockerfile: Dockerfile
-	export R_VERSION=3.2.0 && export BUILD_DATE=2015-06-18 && make update && make use-curl
-## NOTE: MRAN goes back only to 2014-09-17, (during R 3.1.1; 3.1.2 was released in Oct 2014)
-## Also NOTE: littler not avialable before 2015-10-29
-3.1.0/Dockerfile: Dockerfile
-	export R_VERSION=3.1.0 && export BUILD_DATE=2014-09-17 && make update && make use-curl
-
-update:
-	cp Dockerfile ${R_VERSION}/Dockerfile
-	cp post_push ${R_VERSION}/hooks/post_push
-	sed -i 's/${LATEST}/${R_VERSION}/' ${R_VERSION}/Dockerfile
-	sed -i "s/ARG BUILD_DATE/ARG BUILD_DATE\nENV BUILD_DATE $$\{BUILD_DATE:-${BUILD_DATE}\}/" ${R_VERSION}/Dockerfile
-	sed -i 's/## MRAN becomes default only in versioned images/\&\& echo \"options\(repos = c\(CRAN=\x27$$MRAN\x27\), download.file.method = \x27libcurl\x27\)\" >> \/usr\/local\/lib\/R\/etc\/Rprofile.site \\/' ${R_VERSION}/Dockerfile
-
-hooks_update:
-	echo ./*/hooks/ | xargs -n 1 cp post_push
-
-## libcurl not an option before 3.3.0, https support requires curl
-use-curl:
-	sed -i "s/'libcurl'/'curl'/g" ${R_VERSION}/Dockerfile
-	sed -i 's/curl \\/\\/' ${R_VERSION}/Dockerfile
-	sed -i 's/ca-certificates/ca-certificates curl/' ${R_VERSION}/Dockerfile
-
-clean:
-	rm  3.*/Dockerfile 3.*/hooks/post_push
-