remove unnecessary GOPATH stuff

Makefile

@@ -12,9 +12,6 @@ VERSION := $(shell git describe --tags --abbrev=0 --exact-match 2>/dev/null)
 COVER_PROFILE := coverage.txt
 # Disable go sum database lookup for private repos
 GOPRIVATE := github.com/dapperlabs/*
-# Ensure go bin path is in path (Especially for CI)
-GOPATH ?= $(HOME)/go
-PATH := $(PATH):$(GOPATH)/bin
 # OS
 UNAME := $(shell uname)
 
@@ -28,8 +25,6 @@ binary: $(BINARY)
 
 .PHONY: install-tools
 install-tools:
-	cd '${GOPATH}'; \
-	mkdir -p '${GOPATH}'; \
 	GO111MODULE=on go install github.com/axw/gocov/gocov@latest; \
 	GO111MODULE=on go install github.com/matm/gocov-html/cmd/gocov-html@latest; \
 	GO111MODULE=on go install github.com/sanderhahn/gozip/cmd/gozip@latest; \