tools: Remove perf

It's not build as part of the kernel build.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

tools/perf/.gitignore

@@ -1 +0,0 @@
-/bin

tools/perf/Dockerfile

@@ -1,35 +0,0 @@
-FROM alpine:3.4
-
-RUN \
-  apk update && apk upgrade && \
-  apk add \
-  argp-standalone \
-  automake \
-  bc \
-  binutils-dev \
-  bison \
-  build-base \
-  curl \
-  flex \
-  libelf-dev \
-  linux-headers \
-  sed \
-  tar \
-  util-linux-dev \
-  xz \
-  && true
-
-ARG KERNEL_VERSION=4.9.3
-
-# get kernel source and extract it under /linux
-ENV KERNEL_SOURCE=https://www.kernel.org/pub/linux/kernel/v4.x/linux-${KERNEL_VERSION}.tar.xz
-RUN curl -fsSL -o linux-${KERNEL_VERSION}.tar.xz ${KERNEL_SOURCE}
-RUN cat linux-${KERNEL_VERSION}.tar.xz | tar --absolute-names -xJ &&  mv /linux-${KERNEL_VERSION} /linux
-
-RUN mkdir -p /build/perf && \
-    make -C /linux/tools/perf O=/build/perf LDFLAGS=-static
-
-WORKDIR /build/perf
-CMD ["tar", "cf", "-", "perf"]
-    
-    

tools/perf/Makefile

@@ -1,12 +0,0 @@
-BASE=alpine:3.4
-
-DEPS=Dockerfile
-
-bin/perf: $(DEPS)
-	DOCKER_CONTENT_TRUST=1 docker pull $(BASE)
-	mkdir -p $(dir $@)
-	BUILD=$$( docker build -q . ) && \
-	docker run --rm --net=none $$BUILD | tar xf - -C bin
-
-clean:
-	rm -rf bin

tools/perf/README.md

@@ -1 +0,0 @@
-Builds a statically linked version of the Linux kernel `perf` utility. You may want to/need to adjust the kernel version in the `Dockerfile` to match your kernel.