Revert "cmd/ebitenmobile: Use the better way to go-get dependencies"
Revert "cmd/ebitenmobile: Use the better way to go-get dependencies"

This reverts commit ad2d3562620f29a617c1f77f20c5420760e9f266.

Reason: Installation failed on Windows.

Closes #1493

hajimehoshi/ebiten,hajimehoshi/ebiten