.github/workflows: remove unused build tags

.github/workflows/test.yml

@@ -37,29 +37,29 @@ jobs:
       - name: go vet
         if: ${{ !startsWith(matrix.os, 'windows-') && !startsWith(matrix.os, 'macos-') }}
         run: |
-          go vet -tags=example -v ./...
+          go vet -v ./...
 
       - name: go build
         run: |
-          go build -tags=example -v ./...
+          go build -v ./...
           # Compile without optimization to check potential stack overflow.
           # The option '-gcflags=all=-N -l' is often used at Visual Studio Code.
           # See also https://go.googlesource.com/vscode-go/+/HEAD/docs/debugging.md#launch and the issue hajimehoshi/ebiten#2120.
-          go build -tags=example "-gcflags=all=-N -l" -v ./...
+          go build "-gcflags=all=-N -l" -v ./...
 
           # Check cross-compiling WebAssembly.
           # Unfortunately it is difficult to test Oto on browsers since this requires user interactions.
-          env GOOS=js GOARCH=wasm go build -tags=example -v ./...
+          env GOOS=js GOARCH=wasm go build -v ./...
 
           # Check cross-compiling Windows binaries.
-          env GOOS=windows GOARCH=386 go build -tags=example -v ./...
-          env GOOS=windows GOARCH=amd64 go build -tags=example -v ./...
-          env GOOS=windows GOARCH=arm go build -tags=example -v ./...
-          env GOOS=windows GOARCH=arm64 go build -tags=example -v ./...
+          env GOOS=windows GOARCH=386 go build -v ./...
+          env GOOS=windows GOARCH=amd64 go build -v ./...
+          env GOOS=windows GOARCH=arm go build -v ./...
+          env GOOS=windows GOARCH=arm64 go build -v ./...
 
           # Check cross-compiling macOS binaries.
-          env GOOS=darwin GOARCH=amd64 go build -tags=example -v ./...
-          env GOOS=darwin GOARCH=arm64 go build -tags=example -v ./...
+          env GOOS=darwin GOARCH=amd64 go build -v ./...
+          env GOOS=darwin GOARCH=arm64 go build -v ./...
 
       - name: go mod vendor
         run: |
@@ -78,4 +78,4 @@ jobs:
 
       - name: go test
         run: |
-          go test -tags=example -shuffle=on -v -count=10 ./...
+          go test -shuffle=on -v -count=10 ./...