update travis to build with go1.10

Remove the vet target too, since vet is now always run with every test.

.travis.yml

@@ -2,7 +2,7 @@ dist: trusty
 sudo: false
 language: go
 go:
-- 1.9.1
+- 1.10
 
 # add TF_CONSUL_TEST=1 to run consul tests
 # they were causing timouts in travis
@@ -34,7 +34,6 @@ script:
 - make vendor-status
 - make test
 - make e2etest
-- make vet
 - GOOS=windows go build
 branches:
   only:

Makefile

@@ -68,17 +68,6 @@ cover:
 	go tool cover -html=coverage.out
 	rm coverage.out
 
-# vet runs the Go source code static analysis tool `vet` to find
-# any common errors.
-vet:
-	@echo 'go vet ./...'
-	@go vet ./... ; if [ $$? -eq 1 ]; then \
-		echo ""; \
-		echo "Vet found suspicious constructs. Please check the reported constructs"; \
-		echo "and fix them if necessary before submitting the code for review."; \
-		exit 1; \
-	fi
-
 # generate runs `go generate` to build the dynamically generated
 # source files.
 generate:
@@ -102,4 +91,4 @@ vendor-status:
 # under parallel conditions.
 .NOTPARALLEL:
 
-.PHONY: bin cover default dev e2etest fmt fmtcheck generate plugin-dev quickdev test-compile test testacc testrace tools vendor-status vet
+.PHONY: bin cover default dev e2etest fmt fmtcheck generate plugin-dev quickdev test-compile test testacc testrace tools vendor-status