chore: remove doc URL from Cargo.toml (#4251)

https://doc.rust-lang.org/cargo/reference/manifest.html#the-documentation-field

> If no URL is specified in the manifest file, crates.io will
> automatically link your crate to the corresponding docs.rs page.

tokio-macros/Cargo.toml

@@ -2,8 +2,6 @@
 name = "tokio-macros"
 # When releasing to crates.io:
 # - Remove path dependencies
-# - Update doc url
-#   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-macros-1.0.x" git tag.
 version = "1.6.0"
@@ -13,7 +11,6 @@ authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-macros/1.6.0/tokio_macros"
 description = """
 Tokio's proc macros.
 """

tokio-stream/Cargo.toml

@@ -2,8 +2,6 @@
 name = "tokio-stream"
 # When releasing to crates.io:
 # - Remove path dependencies
-# - Update doc url
-#   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-stream-0.1.x" git tag.
 version = "0.1.8"
@@ -13,7 +11,6 @@ authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-stream/0.1.8/tokio_stream"
 description = """
 Utilities to work with `Stream` and `tokio`.
 """

tokio-test/Cargo.toml

@@ -2,8 +2,6 @@
 name = "tokio-test"
 # When releasing to crates.io:
 # - Remove path dependencies
-# - Update doc url
-#   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-test-0.4.x" git tag.
 version = "0.4.2"
@@ -13,7 +11,6 @@ authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-test/0.4.2/tokio_test"
 description = """
 Testing utilities for Tokio- and futures-based code
 """

tokio-util/Cargo.toml

@@ -2,8 +2,6 @@
 name = "tokio-util"
 # When releasing to crates.io:
 # - Remove path dependencies
-# - Update doc url
-#   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-util-0.6.x" git tag.
 version = "0.6.9"
@@ -13,7 +11,6 @@ authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-util/0.6.9/tokio_util"
 description = """
 Additional utilities for working with Tokio.
 """

tokio/Cargo.toml

@@ -3,7 +3,6 @@ name = "tokio"
 # When releasing to crates.io:
 # - Remove path dependencies
 # - Update doc url
-#   - Cargo.toml
 #   - README.md
 # - Update CHANGELOG.md.
 # - Create "v1.0.x" git tag.
@@ -13,7 +12,6 @@ rust-version = "1.46"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 readme = "README.md"
-documentation = "https://docs.rs/tokio/1.14.0/tokio/"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
 description = """

tokio/tests/rt_handle_block_on.rs

@@ -135,7 +135,7 @@ rt_test! {
         let contents = Handle::current()
             .block_on(fs::read_to_string("Cargo.toml"))
             .unwrap();
-        assert!(contents.contains("Cargo.toml"));
+        assert!(contents.contains("https://tokio.rs"));
     }
 
     #[test]