Remove release scripts for minio. (#5181)

Use `GOOS=<osname> go build`  to build minio for any platform of choice.

Makefile

@@ -94,12 +94,6 @@ install: build
 	@cp $(PWD)/minio $(GOPATH)/bin/minio
 	@echo "Check 'minio -h' for help."
 
-release: verifiers
-	@MINIO_RELEASE=RELEASE ./buildscripts/build.sh
-
-experimental: verifiers
-	@MINIO_RELEASE=EXPERIMENTAL ./buildscripts/build.sh
-
 clean:
 	@echo "Cleaning up all the generated files"
 	@find . -name '*.test' | xargs rm -fv

buildscripts/build.sh

@@ -1,110 +0,0 @@
-#!/bin/bash
-
-_init() {
-    # Save release LDFLAGS
-    LDFLAGS=$(go run buildscripts/gen-ldflags.go)
-
-    # Extract release tag
-    release_tag=$(echo $LDFLAGS | awk {'print $6'} | cut -f2 -d=)
-
-    # Verify release tag.
-    if [ -z "$release_tag" ]; then
-        echo "Release tag cannot be empty. Please check return value of \`go run buildscripts/gen-ldflags.go\`"
-        exit 1;
-    fi
-
-    # Extract release string.
-    release_str=$(echo $MINIO_RELEASE | tr '[:upper:]' '[:lower:]')
-
-    # Verify release string.
-    if [ -z "$release_str" ]; then
-        echo "Release string cannot be empty. Please set \`MINIO_RELEASE\` env variable."
-        exit 1;
-    fi
-
-    # List of supported architectures
-    SUPPORTED_OSARCH='linux/amd64 windows/amd64 darwin/amd64'
-
-    ## System binaries
-    CP=`which cp`
-    SHASUM=`which shasum`
-    SHA256SUM="${SHASUM} -a 256"
-    SED=`which sed`
-}
-
-go_build() {
-    local osarch=$1
-    os=$(echo $osarch | cut -f1 -d'/')
-    arch=$(echo $osarch | cut -f2 -d'/')
-    package=$(go list -f '{{.ImportPath}}')
-    echo -n "-->"
-    printf "%15s:%s\n" "${osarch}" "${package}"
-
-    # Release binary name
-    release_bin="$release_str/$os-$arch/$(basename $package).$release_tag"
-    # Release binary downloadable name
-    release_real_bin="$release_str/$os-$arch/$(basename $package)"
-
-    # Release sha1sum name
-    release_shasum="$release_str/$os-$arch/$(basename $package).${release_tag}.shasum"
-    # Release sha1sum default
-    release_shasum_default="$release_str/$os-$arch/$(basename $package).shasum"
-
-    # Release sha256sum name
-    release_sha256sum="$release_str/$os-$arch/$(basename $package).${release_tag}.sha256sum"
-    # Release sha256sum default
-    release_sha256sum_default="$release_str/$os-$arch/$(basename $package).sha256sum"
-
-    # Go build to build the binary.
-    CGO_ENABLED=0 GOOS=$os GOARCH=$arch go build --ldflags "${LDFLAGS}" -o $release_bin
-
-    # Create copy
-    if [ $os == "windows" ]; then
-        $CP -p $release_bin ${release_real_bin}.exe
-    else
-        $CP -p $release_bin $release_real_bin
-    fi
-
-    # Calculate sha1sum
-    shasum_str=$(${SHASUM} ${release_bin})
-    echo ${shasum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_shasum
-    $CP -p $release_shasum $release_shasum_default
-
-    # Calculate sha256sum
-    sha256sum_str=$(${SHA256SUM} ${release_bin})
-    echo ${sha256sum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_sha256sum
-    $CP -p $release_sha256sum $release_sha256sum_default
-}
-
-main() {
-    # Build releases.
-    echo "Executing $release_str builds for OS: ${SUPPORTED_OSARCH}"
-    echo  "Choose an OS Arch from the below"
-    for osarch in ${SUPPORTED_OSARCH}; do
-        echo ${osarch}
-    done
-
-    read -p "If you want to build for all, Just press Enter: " chosen_osarch
-    if [ "$chosen_osarch" = "" ] || [ "$chosen_osarch" = "all" ]; then
-        for each_osarch in ${SUPPORTED_OSARCH}; do
-            go_build ${each_osarch}
-        done
-    else
-        local found=0
-        for each_osarch in ${SUPPORTED_OSARCH}; do
-            if [ "$chosen_osarch" = "$each_osarch" ]; then
-                found=1
-            fi
-        done
-        if [ ${found} -eq 1 ]; then
-            go_build ${chosen_osarch}
-        else
-            echo "Unknown architecture \"${chosen_osarch}\""
-            exit 1
-        fi
-    fi
-
-}
-
-# Run main.
-_init && main