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gnu: Remove rust-cargo-0.51. * gnu/packages/crates-io.scm (rust-cargo-0.51): Delete variable.
gnu: Remove rust-cfg-expr-0.7. * gnu/packages/crates-io.scm (rust-cfg-expr-0.7): Delete variable.
gnu: Remove rust-chalk-recursive-0.68. * gnu/packages/crates-io.scm (rust-chalk-recursive-0.68): Delete variable.
gnu: Remove rust-clipboard-win-2. * gnu/packages/crates-io.scm (rust-clipboard-win-2): Delete variable.
gnu: Remove rust-colored-1.9.1. * gnu/packages/crates-io.scm (rust-colored-1.9.1): Delete variable.
gnu: Remove rust-core-text-13. * gnu/packages/crates-io.scm (rust-core-text-13): Delete variable.
gnu: Remove rust-cov-mark-1. * gnu/packages/crates-io.scm (rust-cov-mark-1): Delete variable.
gnu: Remove rust-cpuid-bool-0.1. * gnu/packages/crates-io.scm (rust-cpuid-bool-0.1): Delete variable.
gnu: Remove rust-crossbeam-deque-0.6. * gnu/packages/crates-io.scm (rust-crossbeam-deque-0.6): Delete variable.
gnu: Remove rust-cryptovec-0.4. * gnu/packages/crates-io.scm (rust-cryptovec-0.4): Delete variable.
gnu: Remove rust-delta-e-0.2. * gnu/packages/crates-io.scm (rust-delta-e-0.2): Delete variable.
gnu: Remove rust-derive-builder-0.5. * gnu/packages/crates-io.scm (rust-derive-builder-0.5): Delete variable.
gnu: Remove rust-derive-is-enum-variant-0.1. * gnu/packages/crates-io.scm (rust-derive-is-enum-variant-0.1): Delete variable.
gnu: Remove rust-dialoguer-0.3. * gnu/packages/crates-io.scm (rust-dialoguer-0.3): Delete variable.
gnu: Remove rust-diffus-0.10. * gnu/packages/crates-io.scm (rust-diffus-0.10): Delete variable.
gnu: Remove rust-directories-next-1. * gnu/packages/crates-io.scm (rust-directories-next-1): Delete variable.
gnu: Remove rust-dwrote-0.9. * gnu/packages/crates-io.scm (rust-dwrote-0.9): Delete variable.
gnu: Remove rust-eax-0.3. * gnu/packages/crates-io.scm (rust-eax-0.3): Delete variable.
gnu: Remove rust-enumflags2-0.6. * gnu/packages/crates-io.scm (rust-enumflags2-0.6): Delete variable.