Feature request: --drop for labels

[pushkine]

Feature request:

Option to define ids of LabelStatements to be stripped from the output

e.g. --droplabel:__DEV__

I find labels to be a better solution over build-time variable injection
Rollup has a plugin called "@rollup/plugin-strip" for this purpose:

plugins: [
    // strips all `__DEV__: ...` labels
    strip({ labels: ["__DEV__"], include: "**/*.ts" }),
]

Might be a niche request but this is actually the only rollup feature I ever use beside transpilers, I'd love to have that option on esbuild