clean up manifests

Author: RalfJung

Diff for: src/tools/rustc-std-workspace/rustc-std-workspace-alloc/Cargo.toml

@@ -2,10 +2,10 @@
 name = "rustc-std-workspace-alloc"
 version = "1.0.1"
 authors = ["Alex Crichton <[email protected]>"]
-edition = "2018"
+edition = "2021"
 license = 'MIT/Apache-2.0'
-description = 'workspace hack'
+description = """
+crate for integration of crates.io crates into rust-lang/rust standard library workspace
+"""
 
 repository = "https://github.com/rust-lang/rust/tree/master/src/tools/rustc-std-workspace"
-
-[dependencies]

Diff for: src/tools/rustc-std-workspace/rustc-std-workspace-core/Cargo.toml

@@ -2,11 +2,10 @@
 name = "rustc-std-workspace-core"
 version = "1.0.1"
 authors = ["Alex Crichton <[email protected]>"]
+edition = "2021"
 license = "MIT/Apache-2.0"
 description = """
-Explicitly empty crate for rust-lang/rust integration
+crate for integration of crates.io crates into rust-lang/rust standard library workspace
 """
 
 repository = "https://github.com/rust-lang/rust/tree/master/src/tools/rustc-std-workspace"
-
-[dependencies]

Diff for: src/tools/rustc-std-workspace/rustc-std-workspace-std/Cargo.toml

@@ -2,11 +2,10 @@
 name = "rustc-std-workspace-std"
 version = "1.0.1"
 authors = ["Alex Crichton <[email protected]>"]
+edition = "2021"
 license = "MIT/Apache-2.0"
-description = "Workaround for rustbuild"
+description = """
+crate for integration of crates.io crates into rust-lang/rust standard library workspace
+"""
 
 repository = "https://github.com/rust-lang/rust/tree/master/src/tools/rustc-std-workspace"
-
-[lib]
-name = "std"
-