Use sarama built in support for consumer groups (#6172)

Makefile

@@ -1,9 +1,8 @@
-ifeq ($(SHELL), cmd)
-	VERSION := $(shell git describe --exact-match --tags 2>nil)
-	HOME := $(HOMEPATH)
-else ifeq ($(SHELL), sh.exe)
+ifeq ($(OS), Windows_NT)
 	VERSION := $(shell git describe --exact-match --tags 2>nil)
 	HOME := $(HOMEPATH)
+	CGO_ENABLED ?= 0
+	export CGO_ENABLED
 else
 	VERSION := $(shell git describe --exact-match --tags 2>/dev/null)
 endif
@@ -48,7 +47,6 @@ install: telegraf
 	mkdir -p $(DESTDIR)$(PREFIX)/bin/
 	cp telegraf $(DESTDIR)$(PREFIX)/bin/
 
-
 .PHONY: test
 test:
 	go test -short ./...