Remove grep dependency

Signed-off-by: Yuki Iwai <[email protected]>

Makefile

@@ -10,17 +10,6 @@ else
 GOBIN=$(shell go env GOBIN)
 endif
 
-# Setting GREP allows macos users to install GNU grep and use the latter
-# instead of the default BSD grep.
-ifeq ($(shell command -v ggrep 2>/dev/null),)
-    GREP ?= $(shell command -v grep)
-else
-    GREP ?= $(shell command -v ggrep)
-endif
-ifeq ($(shell ${GREP} --version 2>&1 | grep -q GNU; echo $$?),1)
-    $(error !!! GNU grep is required. If on OS X, use 'brew install grep'.)
-endif
-
 # Setting SHELL to bash allows bash commands to be executed by recipes.
 # This is a requirement for 'setup-envtest.sh' in the test target.
 # Options are set to exit when a recipe line exits non-zero or a piped command fails.
@@ -93,7 +82,7 @@ test-integrationv2: envtest
 
 .PHONY: testv2
 testv2:
-	go test $(shell go list ./pkg/... | $(GREP) -E '.*\.v2') -coverprofile cover.out
+	go test ./pkg/controller.v2/... ./pkg/runtime.v2/... ./pkg/webhook.v2/... ./pkg/util.v2/... -coverprofile cover.out
 
 envtest:
 ifndef HAS_SETUP_ENVTEST