ci(benchmarks): clean up scripts

Remove unused code, follow conventions

bin/benchmark-to-file.sh

 #!/bin/bash
-output="$1"
-branch="$2"
 
 git checkout "$2"
 

bin/build.sh

-#!/bin/bash
-set -eo pipefail
-
-list_buildable() {
-    go list -f '{{if (len .GoFiles)}}{{.ImportPath}} {{if .Module}}{{.Module.Dir}}{{else}}{{.Dir}}{{end}}{{end}}' ./... | grep -v /vendor/
-}
-
-build_all() {
-    # Make sure everything can compile since some package may not have tests
-    # Note: that "go build ./..." will fail if some packages have only
-    #   tests (will get "no buildable Go source files" error) so we
-    #   have to do this the hard way.
-    list_buildable | while read -r pkg dir; do
-        echo '*** go build' "$pkg"
-        buildmode=archive
-        if [[ "$(go list -f '{{.Name}}')" == "main" ]]; then
-            # plugin works even when a "main" function is missing.
-            buildmode=plugin
-        fi
-        ( cd "$dir"; go build -buildmode=$buildmode -o /dev/null "$pkg")
-    done
-}
-
-build_all
\ No newline at end of file

bin/diff-benchmarks.sh

 #!/bin/bash
 
-before="$1"
-after="$2"
-
 parse() {
     sed -n \
         -e 's/ *\t */\t/g' \
@@ -29,4 +26,4 @@ if [[ $? -ne 4 ]]; then
     exit 1
 else
     echo "PASS"
-fi
\ No newline at end of file
+fi

bin/run-benchmarks.sh

@@ -3,51 +3,12 @@ set -eo pipefail
 
 display_and_run() {
     echo "***" "$@"
-	eval $(printf '%q ' "$@")
+	eval "$(printf '%q ' "$@")"
 }
 
 # reset workdir to state from git (to remove possible rewritten dependencies)
-display_and_run git reset --hard
-
-# Environment
-echo "*** Setting up test environment"
-if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-    if [[ "$TRAVIS_SUDO" == true ]]; then
-        # Ensure that IPv6 is enabled.
-        # While this is unsupported by TravisCI, it still works for localhost.
-        sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=0
-        sudo sysctl -w net.ipv6.conf.default.disable_ipv6=0
-        sudo sysctl -w net.ipv6.conf.all.disable_ipv6=0
-    fi
-else
-    # OSX has a default file limit of 256, for some tests we need a
-    # maximum of 8192.
-    ulimit -Sn 8192
-fi
-
-list_buildable() {
-    go list -f '{{if (len .GoFiles)}}{{.ImportPath}} {{if .Module}}{{.Module.Dir}}{{else}}{{.Dir}}{{end}}{{end}}' ./... | grep -v /vendor/
-}
-
-build_all() {
-    # Make sure everything can compile since some package may not have tests
-    # Note: that "go build ./..." will fail if some packages have only
-    #   tests (will get "no buildable Go source files" error) so we
-    #   have to do this the hard way.
-    list_buildable | while read -r pkg dir; do
-        echo '*** go build' "$pkg"
-        buildmode=archive
-        if [[ "$(go list -f '{{.Name}}')" == "main" ]]; then
-            # plugin works even when a "main" function is missing.
-            buildmode=plugin
-        fi
-        ( cd "$dir"; go build -buildmode=$buildmode -o /dev/null "$pkg")
-    done
-}
-
 export GO111MODULE=on
 display_and_run go get golang.org/x/tools/cmd/benchcmp
-build_all
 display_and_run git reset --hard
 git checkout -b after
 git fetch origin master:refs/remotes/origin/before
@@ -59,4 +20,4 @@ git checkout after
 display_and_run BENCHMARK_SEED="$$" ./bin/benchmark-to-file.sh benchmark-after.txt after
 if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
 display_and_run ./bin/diff-benchmarks.sh benchmark-before.txt benchmark-after.txt
-fi
\ No newline at end of file
+fi