remove debug-logging default from tools profile

`debug-logging` conflicts with `download-rustc` option, and doesn't really
make sense to enable it for a profile that is used for tool development.

Signed-off-by: onur-ozkan <work@onurozkan.dev>

src/bootstrap/defaults/config.tools.toml

@@ -1,10 +1,6 @@
 # These defaults are meant for contributors to tools which build on the
 # compiler, but do not modify it directly.
 [rust]
-# This enables `RUSTC_LOG=debug`, avoiding confusing situations
-# where adding `debug!()` appears to do nothing.
-# However, it makes running the compiler slightly slower.
-debug-logging = true
 # This greatly increases the speed of rebuilds, especially when there are only minor changes. However, it makes the initial build slightly slower.
 incremental = true
 # Download rustc from CI instead of building it from source.

src/bootstrap/src/utils/change_tracker.rs

@@ -200,4 +200,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Warning,
         summary: "`llvm.lld` is enabled by default for the dist profile. If set to false, `lld` will not be included in the dist build.",
     },
+    ChangeInfo {
+        change_id: 127913,
+        severity: ChangeSeverity::Warning,
+        summary: "`debug-logging` option has been removed from the default `tools` profile.",
+    },
 ];