chore: Remove rust-version from private packages

I removed it from `cargo-test-support` and `cargo-test-macro`, despite
people depending on those (via git) because my long term plan is resting
on the `auto` value which won't affect git dependencies.

Author: epage

benches/benchsuite/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "benchsuite"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 license.workspace = true
 homepage = "https://github.com/rust-lang/cargo"

benches/capture/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "capture"
 version = "0.1.0"
-rust-version.workspace = true
 edition.workspace = true
 license.workspace = true
 description = "Tool for capturing a real-world workspace for benchmarking."

crates/cargo-test-macro/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "cargo-test-macro"
 version = "0.1.0"
-rust-version.workspace = true
 edition.workspace = true
 license.workspace = true
 homepage.workspace = true

crates/cargo-test-support/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "cargo-test-support"
 version = "0.1.0"
-rust-version.workspace = true
 license.workspace = true
 edition.workspace = true
 publish = false

crates/mdman/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "mdman"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 license.workspace = true
 description = "Creates a man page page from markdown."

crates/resolver-tests/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "resolver-tests"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 publish = false
 

crates/semver-check/Cargo.toml

@@ -2,7 +2,6 @@
 name = "semver-check"
 version = "0.0.0"
 authors = ["Eric Huss"]
-rust-version.workspace = true
 edition.workspace = true
 publish = false
 

crates/xtask-build-man/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "xtask-build-man"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 publish = false
 

crates/xtask-bump-check/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "xtask-bump-check"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 publish = false
 

crates/xtask-stale-label/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "xtask-stale-label"
 version = "0.0.0"
-rust-version.workspace = true
 edition.workspace = true
 publish = false