Rollup merge of rust-lang#46386 - Aaron1011:fix_rustdoc_log, r=Mark-Simulacrum

Remove librustdoc dependency on env_logger

We want librustdoc to pickup the env_logger dependency from
the sysroot. This ensures that the same copy of env_logger is used
for both internal crates (e.g. librustc_driver, libsyntax) and
librustdoc

Closes rust-lang#46383

Author: Ariel Ben-Yehuda

src/Cargo.lock

@@ -11,7 +11,6 @@ path = "lib.rs"
 doctest = false
 
 [dependencies]
-env_logger = { version = "0.4", default-features = false }
 log = "0.3"
 pulldown-cmark = { version = "0.1.0", default-features = false }
 html-diff = "0.0.5"