Remove compat from go mod tidy (#213)

* Makefile: extract Go version from go.mod

Signed-off-by: Florian Lehner <[email protected]>

* fixup: drop GO_VERSION

With the removal of -compat in go-mod-tidy GO_VERSION is no longer used.

Signed-off-by: Florian Lehner <[email protected]>

---------

Signed-off-by: Florian Lehner <[email protected]>
Co-authored-by: Robert Pająk <[email protected]>

Author: florianl

Makefile

@@ -37,7 +37,6 @@ $(error Submodule at $(OTEL_PROTO_SUBMODULE) is not checked out, use "git submod
 endif
 
 GO                := go
-GO_VERSION        := 1.17
 GO_MOD_ROOT       := go.opentelemetry.io/proto
 ALL_GO_MOD_DIRS := $(shell find . -type f -name 'go.mod' -exec dirname {} \; | sort)
 OTEL_GO_MOD_DIRS := $(filter-out $(TOOLS_MOD_DIR), $(ALL_GO_MOD_DIRS))
@@ -165,7 +164,7 @@ go-mod-tidy/%: DIR=$*
 go-mod-tidy/%:
 	@echo "$(GO) mod tidy in $(DIR)" \
 		&& cd $(DIR) \
-		&& $(GO) mod tidy -compat=1.21
+		&& $(GO) mod tidy
 
 test: $(OTEL_GO_MOD_DIRS:%=test/%)
 test/%: DIR=$*