Removed GOPATH check (#1026)

* Removed GOPATH check

Signed-off-by: Vikram Hosakote <[email protected]>

* Removed doc

Signed-off-by: Vikram Hosakote <[email protected]>

Author: vhosakot

Makefile

@@ -1,7 +1,3 @@
-ifeq ($(GOPATH),)
-$(error GOPATH is not set. Set GOPATH by doing "export GOPATH=<your GOPATH>".)
-endif
-
 .PHONY: all all-CI build clean default unit-test release tar checks go-version gofmt-src \
 	golint-src govet-src run-build compile-with-docker