Remove megacheck for now

Reason: https://github.com/dominikh/go-tools/issues/269

.travis.yml

@@ -7,7 +7,7 @@ install:
 - go get github.com/nats-io/go-nats
 - go get github.com/mattn/goveralls
 - go get github.com/wadey/gocovmerge
-- go get -u honnef.co/go/tools/cmd/megacheck
+#- go get -u honnef.co/go/tools/cmd/megacheck
 - go get -u github.com/client9/misspell/cmd/misspell
 before_script:
 - EXCLUDE_VENDOR=$(go list ./... | grep -v "/vendor/")
@@ -15,7 +15,7 @@ before_script:
 - $(exit $(go fmt $EXCLUDE_VENDOR | wc -l))
 - go vet $EXCLUDE_VENDOR
 - misspell -error -locale US .
-- megacheck $EXCLUDE_VENDOR
+#- megacheck $EXCLUDE_VENDOR
 - if [[ "$TRAVIS_GO_VERSION" == 1.9.* ]]; then ./scripts/cross_compile.sh $TRAVIS_TAG; fi
 script:
 - go test -i -race $EXCLUDE_VENDOR