[chore] Remove checkdoc (aws-observability#828)

checkdoc will be removed in the next release open-telemetry/opentelemetry-go-build-tools#380 in favor of checkfile. Here, it doesn't seem like checkdoc is used at all so removing altogether.

Issue: open-telemetry/opentelemetry-go-build-tools#349

Author: mackjmr

collector/Makefile

@@ -89,7 +89,6 @@ install-tools:
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install github.com/pavius/impi/cmd/impi
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install github.com/tcnksm/ghr
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install github.com/wadey/gocovmerge
-	cd $(TOOLS_MOD_DIR) && $(GOCMD) install go.opentelemetry.io/build-tools/checkdoc
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install go.opentelemetry.io/build-tools/chloggen
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install go.opentelemetry.io/build-tools/semconvgen
 	cd $(TOOLS_MOD_DIR) && $(GOCMD) install golang.org/x/exp/cmd/apidiff

collector/internal/tools/go.mod

@@ -11,7 +11,6 @@ require (
 	github.com/pavius/impi v0.0.3
 	github.com/tcnksm/ghr v0.16.0
 	github.com/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad
-	go.opentelemetry.io/build-tools/checkdoc v0.4.0
 	go.opentelemetry.io/build-tools/chloggen v0.4.0
 	go.opentelemetry.io/build-tools/crosslink v0.4.0
 	go.opentelemetry.io/build-tools/multimod v0.4.0

collector/internal/tools/go.sum

@@ -698,8 +698,6 @@ go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.opentelemetry.io/build-tools v0.4.0 h1:gcu5ArCA4Dkq1FBXcs/AB9Smmyx0aLni0GpavgCv+oQ=
 go.opentelemetry.io/build-tools v0.4.0/go.mod h1:csnTV1XNFB7X17EoL0f4gOn/GA6oWI2UK282xLbPcY0=
-go.opentelemetry.io/build-tools/checkdoc v0.4.0 h1:nAabFD08BAgWoYemxArczT3eyIYA15A0+1lO7I67DiI=
-go.opentelemetry.io/build-tools/checkdoc v0.4.0/go.mod h1:/rgaMW6R93bf30RBgBxi7qwME5xGqm7JOQM4JC/PzrU=
 go.opentelemetry.io/build-tools/chloggen v0.4.0 h1:aQvTkfJaRVUfsamG6D2uCzTOiWB28rfL98qXNwesbEI=
 go.opentelemetry.io/build-tools/chloggen v0.4.0/go.mod h1:nS40rEru7lYAwWjuOJptVK7xVjYxaY8+P8YiNFA77cQ=
 go.opentelemetry.io/build-tools/crosslink v0.4.0 h1:gnDpIw+y9aTZYEGW4CBcQa6RM6e+Is/rEI8w2YQxAL8=

collector/internal/tools/tools.go

@@ -26,7 +26,6 @@ import (
 	_ "github.com/pavius/impi/cmd/impi"
 	_ "github.com/tcnksm/ghr"
 	_ "github.com/wadey/gocovmerge"
-	_ "go.opentelemetry.io/build-tools/checkdoc"
 	_ "go.opentelemetry.io/build-tools/chloggen"
 	_ "go.opentelemetry.io/build-tools/crosslink"
 	_ "go.opentelemetry.io/build-tools/multimod"